TikTok is a bad math goldmine! Solving x+2=x-2. Reddit r/sciencememes

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TikTok is a bad math goldmine! Solving x+2=x-2. Reddit r/sciencememes

Рет қаралды 315,349

Күн бұрын

Learn how to correctly solve the equation x+2=x-2. Subscribe to ‪@bprpmathbasics‬ for more algebra tutorials.
Original post on Reddit: / qjsr7xycd4
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#math #algebra #mathbasics

Пікірлер: 704

@bprpmathbasics Ай бұрын

1 divided by 0 (a 3rd grade teacher & principal both got it wrong) kzfaq.info/get/bejne/ja-PpLNzts6ug4E.html

@ToguMrewuku 28 күн бұрын

You wasted your time with this video.

@appoh100 22 күн бұрын

If you apply limits and assume x is going to negative or positive infinity you get an answer.

@adam.maqavoy 22 күн бұрын

*Reddit* isn't any better.

@adam.maqavoy 22 күн бұрын

@@ToguMrewuku Hi #bot

@Rando2101 10 күн бұрын

@@adam.maqavoy at least reddit has downvotes and a place for math, so people know if they're wrong

@tommysmith5479 Ай бұрын

Let's be honest, you can already see just by looking at the question that this will have no solution...

@bprpmathbasics Ай бұрын

Yes, I can.

@devooko Ай бұрын

This stupid comment has more likes than the comment below this, which has actual valuable information unlike this junk

@BenfengWang Ай бұрын

(X+4) does not equal x

@Verxinn Ай бұрын

Who came up with it was for sure just writing down random numbers, the statement "a number plus two is equal itself minus two" is a paradox

@fzlagges5849 Ай бұрын

@@devookoWell not exactly that because it is still working out something, you can just read it and say no soln exists, because the statement essentially says that find x such that increasing x by 2 is the same as decreasing x by 2, which is not possible. So no solution.

@Coyote_5.0 Ай бұрын

Guy had the mental prowess to apply difference between two squares, but not enough to do the first step right💀💀

@MattMcIrvin Ай бұрын

That's how you can tell that this is almost certainly someone yanking our chain. Most of the algebra is just to distract attention from the blatantly ridiculous first step.

@Shizuna560 Ай бұрын

Bros probably solve the 1st line, then ask chatgpt to solve the rest 💀

@cybore213 Ай бұрын

What he is showing first is the solution from the TikTok video. Then he proceeds to show how it is wrong.

@pegasoltaeclair0611 Ай бұрын

@@cybore213 OC wasn't talking about bprp

@cybore213 Ай бұрын

@pegasoltaeclair0611 Thanks. Sometimes it's hard to figure out who the comment refers to. But I should have figured out that the OP was referring to the guy who posted the TikTok answer.

@kh6853 Ай бұрын

"x+2=x-2" "No it doesn't"

@sayarimamani3605 28 күн бұрын

Nuh uh

@khaitomretro 28 күн бұрын

"Time of day" + 12 hours = "Time of day" - 12 hours

@kebien6020 28 күн бұрын

@@khaitomretro you missed a (mod 24) at the end

@MariaNicolae 27 күн бұрын

@@kebien6020 "x+2 = x-2... in ℤ₄; I'm fine!"

@marvalice3455 25 күн бұрын

@@khaitomretro no. That cannot be used to solve this problem.

@Viki13 Ай бұрын

My eyes are bleeding from the proposed solution

@fireblazenotbulgaria3053 Ай бұрын

I mean they literally could’ve just checked it, there is no way 2+2 = 2-2 (if you use sqrt4 which idk why they didn’t even simplify it down to just 2 but I digress)

@irokosalei5133 Ай бұрын

There's nothing wrong with the way they've written it because √ is always positive.

@error_6o6 Ай бұрын

I think the thing is that -2+2=2-2.

@Viki13 Ай бұрын

@@error_6o6but you're saying x=-2=2

@thge07 Ай бұрын

Quadratics can have multiple solutions, x=2, x=-2 indicates that x could be either, and not that it is both

@wdjigaming2200 Ай бұрын

This is not math this is meth

@jensraab2902 Ай бұрын

😂

@Mike_B-137 27 күн бұрын

I was looking for comment like this. I got micro aneurysm just by looking at it: x+2=x-2 ==> (x+2)(x-2)=0, followed by second step. Yea maybe in some imaginary cosmos where law of mathematics and physics don't exist created by TikTok's influencers.

@jbertucci 26 күн бұрын

Meth is herd

@HelloHamburger 24 күн бұрын

@@Mike_B-137 TikTok managed to combine additive and multiplicative rules together. Because if you divided one side to the other, the other side would be one. If you multiplied, it would be (x-2)(x+2) but the other side would be (x+2)^2. Not 0. Also, if you subtract the one side, you would get zero, but, the other side would = 4. Which, that is one way to find no solutions just like subtracting just the x on both sides. The problem is they multipled on the left side, but, subtracted everything on the right. And broke Algebra rules. So, they applied multiplication to the left side and then assumed the right side would cancel to 0. Remembering some of Algebra but forgot you have to subtract. And then after that incredibly wrong step, it just gets stranger and more wrong. Lol. Gosh. I think the comment may possibly be a troll. Lol. To mess with TikTok, but, not 100%. Could be someone overconfident in their Math abilities. Either way, they seem to have just kept working until they found a solution somehow. And each step seems reasonable to someone untrained in Math, but, to someone who is trained in Math, it is obviously wrong and insane each step of the way to a misshapen "solution".

@victorcadillogutierrez7282 9 күн бұрын

I saw some tiktok coders through other platforms and it was down bad, but this is too much, how come as a society we need to explain x+a = x-a if a /= 0 is wrong. System has failed.

@Cas-Se78.97 Ай бұрын

-Remembers the negative square root -Forgets division exists

@wobaguk Ай бұрын

The fact that he had zero on the right, not 1 implies he was mixing up subtracting with multiplication, not division.

@Kyrelel Ай бұрын

No, he simply copied what tiktok gave as the answer and then explained why it is complete bullcrap. The tiktok was a joke, literally.

@Terraspark4941 29 күн бұрын

@@Kyrelel talking about the commenter, not the guy explaining

@kirigayakazuto7401 24 күн бұрын

@@KyrelelWe say “Once TikTok was launched, parents’ nurture f**ked up” (It’s Chinese, I try to translate it, but it still mean TikTok mess up everything)

@ExplosiveBrohoof Ай бұрын

I hate how the first step is (x+2)(x-2)=0, which immediately implies x=±2, and then the TikTokker goes on to undo that and expand the quadratic out so that they can solve it by taking square roots instead. That almost bothers me more than the fact that the first step is completely bogus.

@weareprobablyinanarguement Ай бұрын

The average tiktokers knowledge of math:

@upisntdownsilly Ай бұрын

it’s probably a 12 year old who was just really eager to use the new identity he learnt

@weareprobablyinanarguement 28 күн бұрын

@LumiaFenrir-nn2pz and you’d be surprised by the number of Asian fetuses that know how to solve quadratic equations in microseconds

@leftylizard9085 24 күн бұрын

Computer Scientist: "x = x+1" Mathematician: "Nuh uh"

@anjhindul 6 күн бұрын

Computer science square root of -1... because computers don't work without "I"

@user-jx4tq2dz7q Ай бұрын

That proposed solution is got to be a ragebait ,

@blacklight683 Ай бұрын

How did you do that?

@spongebubbly 26 күн бұрын

@@blacklight683 there is no sol.

@lilypad429 Ай бұрын

I have a solution, change = to ≠ 😅

@ABHISHEKKUMAR-01024 Ай бұрын

Surely, The equation x + 2 = x - 2 should be replaced with x + 2 ≠ x - 2

@wqrw Ай бұрын

another solution is changing = to > x+2=x-2 (false) x+2>x-2 (true)

@divisix024 Ай бұрын

Another solution, the equation is in Z/2Z

@peternewseterforever Ай бұрын

I love this comment. 😂

@abhirupkundu2778 Ай бұрын

@@wqrwtrue dat.

@metaparalysis3441 Ай бұрын

Not simplifying into 2 is probably intentional so that people won't just mentally check their solution and find out how garbage it is.

@UnfairDare Ай бұрын

Bro got a degree in psychology but failed math 💀

@user-qi2jg2zb5l Ай бұрын

Ахуеть, я только что узнал, что у слова "фигня" есть английский аналог.

@alluseri Ай бұрын

@@user-qi2jg2zb5lне пиши сюда больше никогда

@neurofiedyamato8763 14 күн бұрын

Lol yea most people just nope out seeing square roots even though this one is quite simple. But that means they won't catch how the answer doesn't even work if you plug them in which is checking your work 101

@johnathanpatrick6118 Ай бұрын

It's really unnecessary to do anything past subtracting x on both sides, you got 2 = -2, a likewise always false statement like 0 = -4. What I wanna know is how somebody thought dividing (correction: multiplying) both sides by x - 2 would give 0 on the right side. 🤣🤣🤦🏾‍♂🤦🏾‍♂

@mizapf Ай бұрын

Even worse, this was obviously multiplying both sides with (x-2).

@Kualinar Ай бұрын

That was not dividing both sides. That was multiplying the left side by (x-2) while SUBTRACTING (x-2) from the right side to give that zero. What was done as the first step is this : (x+2) = (x-2) → (x+2)*(x-2) = (x-2) - (x-2) → (x+2)(x-2) = 0

@Tristanlj-555 Ай бұрын

@@KualinarNono, it was just dividing both sides by 1/(x-2). I don’t know what composition rules they’re working under where that equals 0 on the right hand side, but technically it was dividing both sides by 1/… just as much as it was multiplying by (x-2)

@Kualinar Ай бұрын

@@Tristanlj-555 Dividing can never reduce a value to zero. ONLY a subtraction can do that. Then, a division by (x-2) would have made the left side into THIS : (x+2)/(x-2) NOT (x+2)*(x-2)

@Tristanlj-555 Ай бұрын

@@Kualinar I know that. I just finished my last exam, complex analysis for my first year of mathematics at Uni. I alluded to that jokingly by mentioning composition rules.

@soumyanandan1567 Ай бұрын

The question goes like: I love Math = I hate Math

@HelloHamburger 24 күн бұрын

It's a love-hate relationship

@xanderlastname3281 Ай бұрын

Hes getting stronger. He can manipulate the board by sinply tapping it with the back of his marker. We must stop him before its too late

@bprpmathbasics Ай бұрын

😂

@Bearylover Ай бұрын

One day he shall no longer have a need for markers, his mind is enough

@casusbelli9225 Ай бұрын

The real answer is not in finding x. The real answer is that this addition is defined over ring of remainders of division by 4. In which 2 = -2 since 2+2 = 0. Therefore, the equation is true for any x. We are threading in the realms of abstract algebra, where everything is possible.

@Abenteuerlich77 Ай бұрын

Lmao! 😂😅

@Alex-gg9ht 29 күн бұрын

He edited it out

@artemis_furrson Ай бұрын

This is why you should always plug your solution into the original equation to make sure it's correct.

@jacobisbell9388 Ай бұрын

You'll run into a problem here, the solution they got is x = 2 or -2. If you plug in -2 on the left and 2 on the right it technically works. Obviously you're supposed to do the same number for both x values but we're past the point of them doing the right thing.

@artemis_furrson Ай бұрын

@@jacobisbell9388 Yeah to be fair that makes sense.

@Tealen Ай бұрын

@@jacobisbell9388yea but even just looking at the equation, how would x plus n be equal to x minus n. no calculations needed.

@Pingwn 11 күн бұрын

@@Tealen Unless n is 0, which it is not.

@Tealen 11 күн бұрын

@@Pingwn yes, in this case its 2. I should have mentioned it

@spoddie Ай бұрын

I love the tap erase. Super tech white board ;)

@bprpmathbasics Ай бұрын

Thanks!!

@bprpmathbasics Ай бұрын

I got it from Amazon haha

@JoaoMartinsdeOliveira-jk2nt Ай бұрын

@@adityagoyal7110 0-2=-2 0+2=2 -2=2 So no, its not correct

@aryantripathi3766 Ай бұрын

@@adityagoyal7110 aah yes 0 - 2 = 0+2 which would imply or -2 = 2

@TheDeathLove Ай бұрын

@@adityagoyal7110 Since when adding or subtracting to 0 gives back 0? Are you implying 0 is infinite?

@aukword6255 27 күн бұрын

Actually, allowing for sufficient inaccuracy, x=infinity. As x 》infinity Then (infinity+2)/(infinity-2) 》1

@vasiliynkudryavtsev 21 күн бұрын

Exactly. And -infinity as well.

@aukword6255 21 күн бұрын

@@vasiliynkudryavtsev True. Well spotted. 😊

@treeNash 12 күн бұрын

Tis not how infinity works

@aukword6255 12 күн бұрын

@@treeNash Ah, yes, and neither is it how infinity DOESN'T work.🙃

@netanelkomm5636 Ай бұрын

I hate people who are bad at math, and think they are good at it. Even worse - people who know SOME math and do wrong things on PURPOSE and then brag about it just to get FREAKING COMMENTS OF PEOPLE WHO GET MAD AT THEM BUT DON'T UNDERSTAND THAT THIS IS EXACTLY WHAT THEY WANT

@egg5145 Ай бұрын

Using Tiktok is already a signal for the lack of common sense

@TheTransforcer Ай бұрын

Yea I’m no calculus major, but I know enough about (X)’s to put all X’s on one side and everything else that you can on the other. And that gets 0X=-4, which is about as wonky as the first question.

@tundcwe123 Ай бұрын

I am sure that if you would stop at 0X=-4, someone would say X = -4/0

@xanderlastname3281 Ай бұрын

@@tundcwe123i mean now that you mention it..... infinity + 2 = infinity - 2. That is if you consider dividing by zero to equal infinity, and not undefined

@Artleksandr 24 күн бұрын

@@xanderlastname3281infinity is not a number. Can't work with it like that outside of a limit or other special conditions.

@xanderlastname3281 24 күн бұрын

@@Artleksandr ok but it's a concept If you have infinitely many things (natural numbers), and you simply append 2 numbers (0 and -1) you still have infinitely many numbers Cardinality hasn't changed If you them subsequently remove -1 and 0, you still have infinitely many numbers Sure it's not a "number number" like 5 or 87, but the concept still works Adding or removing finite elements from an infinite set does not change the cardinality of the set nor the number of elements

@Kualinar Ай бұрын

The very FIRST step of the proposed «solution» is totally wrong. There are NO solution as this define two parallel lines.

@MrMousley Ай бұрын

Before I watch your video I'm going to say NO SOLUTION. How can there be ?

@AizenSosukesama Ай бұрын

I will be born tomorrow and i solved this,how could tiktokers not

@mrdrsir2324 Ай бұрын

Happy birthday

@UlmDoesAnything Ай бұрын

This is why i had a high school teacher who said he doesn't like calling it bringing to the other side because it causes confusion like that You need to be doing the same thing on both sides, so he emphasizes that point in the equality so none of us do such a bjg mistake

@rezwhap 29 күн бұрын

My teacher also hated ‘cancel’ for the same reason. There’s no need to invoke any magic!

@soacespacestation8556 28 күн бұрын

@@rezwhapDoes that also apply to Twitter?

@darcash1738 Ай бұрын

We have: x = x + 4 Now substitute x into x: x = (x + 4) + 4 x = x + 8 x = x + 16 … And similarly this can be done by first subtracting 2 over, ie, x = x - 4 The only way adding these finite quantities can work without affecting anything is if x is +/- ♾️

@rorydaulton6858 Ай бұрын

To be precise, there is no solution in the real numbers or the complex numbers. But there are solutions in other number systems. For example, both the affine extended real number system and the projective real number system has a value infinity, denoted ∞ (or perhaps +∞ in the affine system). We have ∞+2 = ∞-2 = ∞ so ∞ is a solution. I'm sure there are other solutions in other number systems. Perhaps infinite cardinal numbers?

@liamernst9626 Ай бұрын

Integers mod 2 has infinite solutions :)

@rorydaulton6858 Ай бұрын

@@liamernst9626 That is an *excellent* answer! I wish I had thought of it. Of course, modulo 4 also works and has the advantage that "2" is still called 2 in that system.

@vdm942 Ай бұрын

@@rorydaulton6858🤔 this is essentially a question of whether two parallel lines can intersect at one point

@rizzwan-42069 Ай бұрын

@@vdm942no

@BossDropbear Ай бұрын

@@vdm942 Agreed.

@RedShiftedDollar 23 күн бұрын

The graph also helps. It’s y=x graphed with two different offsets. Intuitively they are parallel and will never cross.

@aMartianSpy Ай бұрын

2:41 divide by x-2 😊

@ericmoore6498 Ай бұрын

The graphical solution is to plot y = x-2 and y = x+2. You will find these are two parallel lines. Since they do not intersect, the original equation has no solution. Also, if you begin with a problem with a first-order polynomial and end up with two distinct solutions, you made a mistake. A first-order polynomial can only have one solution. (A line in the XY-plane can intersect the X-axis one or zero times, no more.)

@reddeadlycreeper 26 күн бұрын

The guy didn’t even check his solutions back by plugging them in That’s rule #1 for anything you want to know you’re reasonably correct on

@bobbun9630 16 күн бұрын

I'm sure if the original presenter of this problem and solution had done the check, he would have plugged in the negative value that he obtained on the left side, the positive value on the right, and shown that indeed his solutions work!

@alexjoel1602 29 күн бұрын

x+2=x-2 x=x-4 x/x=x/x-4/x 1=1-4/x 0=-4/x x=-4/0 x=unsigned infinity Now let's see if solution correct. unsigned infinity + 2 = unsigned infinity - 2 unsigned infinity = unsigned infinity Any real number added to unsigned infinity doesn't change it. Solution is correct.

@whoff59 Ай бұрын

The first line is actually saying +2 = -2 as you can subtract x on both sides. That's it.

@WombatMan64 Ай бұрын

I immediately saw both equations as straight lines with gradient 1 and intercept 2 and -2 (y=mx+c). So two parallel straight lines; therefore no solution. Playing with the equation -> x+2 = x-2 Subtract (x-2) from both sides -> x-x+2+2 = 0 -> 4 = 0, which is categorically false so the original equation can't exist. Now to watch and see what bprp does.

@SystemAlchemist 29 күн бұрын

This is wrong. x is obviously {0, 1} in Z_2 (mod 2). Or 2 in Z_4.

@thbb1 Ай бұрын

One solution (over the space of functions, not the reals nor the complex numbers) is that x is a periodic function of period 4, such as sin(pi x/2).

@pocpic 17 күн бұрын

My favorite subgenre of this is when there are multiple fundamental errors, but the result happens to be correct.

@MarIsRandom Ай бұрын

“the input is a contradiction: it has no solutions”

@davidgillies620 Ай бұрын

In complex numbers, |x - 2| = |x + 2| is fairly obviously just any purely imaginary number i.e. Re(x) = 0. But that's the only way to get anything even approximating a solution.

@Zappy714 24 күн бұрын

Was having a breakdown for 4 minutes thinking you were going to come up with a solution.

@LowLess2 23 күн бұрын

Had me questioning my answer 😭

@looseleaf7367 24 күн бұрын

Because he spent so much time going through everything I had an existential crisis where I KNEW that the equation was impossible, and was actively dreading that he was actually going to show a solution that worked somehow and turn my world upside down.

@TheJaguar1983 9 күн бұрын

I was thinking of perhaps having to go complex or something like that, but glad to know that "no solution" was actually the right answer, because I couldn't see it working in the complex plane either.

@masterbeta4480 20 күн бұрын

I genuinely didn’t see any issues about the tik tok solution at first, but then I saw the question

@A207. 21 күн бұрын

The realization that he came back full circle was hilarious

@christopherg2347 13 күн бұрын

1:10 Gesture erasing? Nice feature 😂

@neurofiedyamato8763 14 күн бұрын

Ngl, the screenshot tricked me for a second because I focused on looking at the reply but didn't look back up at what he was solving. So it seemed to make sense until I looked back up and went "wait a minute"

@MoeLester78u1c 27 күн бұрын

x-2=x+2. x-x=4. x(1-1)=4. x(0)=4. x=4/0. x=∞

@_qwerty_3545 12 күн бұрын

I love how literally every step they take is incorrect in some way

@AnonymousMycologist 22 күн бұрын

My calc teacher in high school was known for saying "your calculus would be fine if your algebra wasn't horrible horrible"

@eymentunayildiz Ай бұрын

Infinite is a solution! x + 2 = x - 2 x = ∞: ∞ + 2 = ∞ - 2 ∞ = ∞

@ramasj4m 27 күн бұрын

I cant stop laughing. then remember I have kids. now I am affraid.

@7e13architgupta8 Ай бұрын

This is unrelated but could you please explain why x! = 0 has no solutions (even using gamma function in the complex plane).

@Steve-YT383 16 күн бұрын

I knew the TikTok answer was wrong first look. Didn't trust myself on no solution though. Glad to see that was the answer though!

@Frydragor Ай бұрын

I appreciate your commitment to making a short video with the perfect duration. You da best!

@user-mv7fx4hn6e Ай бұрын

Can you teach me how can I sove this problem, please? sqr(a)+sqr(ab)+sqr(abc)=12 sqr(b)+sqr(bc)+sqr(abc)=21 sqr(c)+sqr(ac)+sqr(abc)=30 Find: (a^2 + b^2 + c^2)

@CARNAGE25 Ай бұрын

Tried but couldn’t solve it. I’d love a video on this problem

@Sqrt.Infinity Ай бұрын

(a^2 + b^2 + c^2) is below the first three equations and on the right side of 'Find:'. Thanks me later.

@jensraab2902 Ай бұрын

There's probably a better approach but you could solve it by brute force. I suggest substituting √a, √b and √c by u, v, and w just to get rid of the square roots. You'll then get this system of equations: u + uv + uvw = 12 v + vw + uvw = 21 w + uw + uvw = 30 Three equations with three variables should yield solutions. Then, plug the solutions into the last term. (Just remember that it will have to be u⁴ + v⁴ + w⁴.) I had WolframAlpha do the work for me. There are three sets of solutions. the sum of squares that we are supposed to find can be either 2433, 10002, or 312688557441/384160000. Like I said, maybe there's a better way but the old-fashioned way should work. If I had to do it by hand, I'd start by subtracting the second from the first equation: u + uv - v - vw = -9 We can isolate u by factoring it out and bringing the other stuff on the right hand side: u (1+v) - (v+vw) = -9 u = (v+vw+9) / (v+1)

@popularmisconception1 Ай бұрын

it took me some time and I must have made a mistake in my regular scholarly attempts, but then it jumped at me: it works for a = 1, b = 1, c = 100, so your result is 10002. method: first substitution for those ugly sqrts: A = sqrt(a), B = sqrt(b), C = sqrt(c), so you get A + AB + ABC = 12 B + BC + ABC = 21 C + AC + ABC = 30 now you see every next equation is 9 bigger, so it is as if you subtract 1 and add 10. and this really works if A = 1, B = 1, C = 10 so you get 1 + 1 + 10 = 12 1 + 10 + 10 = 21 10 + 10 + 10 = 30 A^4 + B^4 + C^4 = 1 + 1 + 10000 = 10002

@user-mv7fx4hn6e Ай бұрын

@@popularmisconception1 Thank you, I liked your idea, but you found the answer by guessing.. Can we solve it by mathematical steps?

@zigaudrey 28 күн бұрын

When you add the X and subtract the other X, there is no way that both side will meet up.

@vibeslide 23 күн бұрын

My problem as a mathematic dummy is that I will forever recall the wrong solution but immediately forget the correct one.

@akultechz2342 27 күн бұрын

x -> infinity Proof: graph or by incomparablity of both variable Hence no *Real* Solution exists

@maxk6856 Ай бұрын

The ans is infinity

@echoi23 Ай бұрын

Or negative infinity -♾️

@markgraham2312 Ай бұрын

You are SOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO right! TikTok should be banned!!

@EndaimeM 27 күн бұрын

Judging by the school course - yes. Theres no answer, but if we go deeper X=infinity. That would be college answer. X+2=X-2 - make+2 to both sides. X+4=X - divide bith by X X/X + 4/X = X/X - subtract X/X 4/X = 0 Any number divided by infinity equals 0.

@GideonHannsz-ht3qm 27 күн бұрын

That tiktok solution is theblitwral definition of "well yes but actually no"

@joshlewis8860 20 күн бұрын

I knew it couldn’t be solved, but watched the whole video just to remember how it was written 😂 “No solution”

@Krishant-fe8gb Ай бұрын

We can prove that equation has no solution Step 1:- write the equation in this form x+2/x-2=1 Step 2:- apply compendo and dividendo and we get x/2=1/0 And we all know that 1/0 is undefined

@blacklight683 Ай бұрын

I mean my instinct was to move everything to 1 side so (x+2)-(x-2)=0 Which is... x+2-x+2=0 Which is 4=0 And i was confused what is the actual solution, but i guess am not that stupid after and and there is none Like what do you mean the answer is not somehow i³+5/3?

@hyx6194 Ай бұрын

I always like to overdramatize when there is no solution.

@GameJam230 29 күн бұрын

I don't know what upsets me more- the fact that the original poster assumed moving the X-2 to the other side would require multiplication by X+2 instead of subtracting from it, or the fact that they EVEN DEFAULTED TO IT OVER DIVISION

@mercuriete 25 күн бұрын

When you plot those lines they never intersect because they are parallel. So having that in mind you know already there won't be any solution. Thats why is very important visualize in your mind the equations first to then plan how to attack the problem.

@kmp8563 23 күн бұрын

Infinity. Undefined. As X gets larger, you get closer to a solution... but you'll never actually get there. 10E99 -2 is basically the same as 10E99 +2. The difference would certainly would be undetectable to even the most high-precision instruments of measurement in any context.

@sonicwaveinfinitymiddwelle8555 Ай бұрын

"x+2=x-2" "Nuh uh"

@DarthAlphaTheGreat 22 күн бұрын

First step is already “WHAT?!”

@wikser7943 Ай бұрын

For those who do not understand, if you draw 2 linear graphs, one for x+2 and one for x-2, you will see that they will never cross each other. The 2 graphs will always be 4 units apart from each other vertically. That's why x+2 is not equal to x-2

@daSora_1 Ай бұрын

Graphs are always a great way to visualize basic equations.

@DaxRaider 27 күн бұрын

For 4 minutes i thought I was stupid thinking this can't be solved with a solution .. damn

@jokubasplayz9068 Ай бұрын

The simplest thing to do is to check your answer by replacing the X with the answer you got. You will immediatly be able to tell the answer makes no sense.

@bobbun9630 16 күн бұрын

I object to dividing both sides by x-2 so carelessly. You need to allow for the possibility that x-2=0, which means you need to divide the problem into cases, one where x-2=0, and the second case where it isn't zero and you can go ahead and do the division. Of course, that doesn't really help, but at least be rigorous in failure to solve the problem!

@wojciechsura Ай бұрын

Move x to the left side, we have x-x+2=-2, then 2=-2, contradiction, done.

@feelshowdy Ай бұрын

If you thought about the initial equation even a little, you can easily see how it's ridiculous. What is a number, where you could either add or subtract 2 from it, and the result is still the same? What is a number where it wouldn't matter whether you added or subtracted anything, it's still the same? And there isn't any real solution.

@IsYitzach 17 күн бұрын

The dividing thing shows that in the limit of x to infinity, you get 1 on both sides. So infinity I guess?

@videakias3000 Күн бұрын

The answer is simple: X=±infinite.

@Thisispercik2 24 күн бұрын

I simply moved all the variables to the left and the numbers to the right just like you and got: x-x=-2-2 0=-4 -4 cannot equal 0 so the equation has no solution.

@schwarzerritter5724 Ай бұрын

Many people attempting to solve math problems seem to forget proving there is no solution is a solution.

@jamesstephenbritton9723 Ай бұрын

You can't just multiply one side by (x-2) and not the other side.

@VoidHxnter 27 күн бұрын

So youre telling me he's confident enough that he got the steps right but didn't bother checking to see if the answer he got fits back into the original equation... Thats some beginner level algebra.

@appoh100 22 күн бұрын

(x+2)/(x-2)=1 Lim{(x+2)/(x-2)=1} as x-> - or + inf (1+0)/(1-0)=1 or (1-0)/(1+0)=1 Therefore X is - or + infinity

@jaykay8426 28 күн бұрын

Great job! At least I can rest easy knowing that some people haven’t lost their minds yet.

@enigma0876 Ай бұрын

Never ask for advice or answers from tiktok.

@Astrophysikus 27 күн бұрын

As a physicist, I would say this has infinitely many approximate solutions: any number that is significantly larger than 2 😀.

@CoMiPrisloZCiny Ай бұрын

the gentleman has as much talent for math as a brick has for swimming

@nicholasscott3287 8 күн бұрын

There is a solution when you take the limit as x approaches infinity.

@Metheglyn Ай бұрын

(x+2) = (x-2) : multiply by (x-2) (x+2)(x-2) = (x-2)^2 : (a+b)(a-b)=a^2-b^2 ; (a-b)^2 = a^2 +b^2 -2ab x^2-2^2 = x^2+2^2-2*2x x^2-4 = x^2+4-4x : subtract (x^2+4) from both sides of equation x^2-x^2-4-4 = -4x -8 = -4x : divide by -4 2 = x : reorder x = 2 : Answer (x+2) = (x-2) : multiply by (x+2) (x+2)^2= (x-2)(x+2) : (a+b)^2=a^2 +b^2 +2ab ; (a-b)(a+b)=a^2-b^2 x^2+2^2+2*2x = x^2-2^2 x^2+4 +4x = x^2-4 : subtract (x^2+4) from both sides of equation x^2-x^2+4-4 +4x= -8 4x = -8 : divide by 4 x = -2 : Answer

@bucsredsoxredwings Ай бұрын

If your answer is 2 and the first step you do is multiply by (x-2), you multiply by 0. Then of course you will get a valid answer. Same for the 2nd try. Your answer is -2, so multiplying by (x+2) in the first step means you multiply by 0, too.

@bucsredsoxredwings Ай бұрын

(x+2) = ( x-2) : multiply by x x²+2x = x²-2x : substract x² 2x = -2x : +2x 4x=0 x=0 So another answer. NO. Same reason as in my above comment.

@nicolasguguen5918 13 күн бұрын

Put aside the first step, I think developing the expression (x+2)(x-2) is also quite shocking, as the null product tells us that x+2=x-2. It’s like taking (3x+8)(x-1)=0, developing it and using the quadratic formula, it is just dumb.

@thelosts9940 27 күн бұрын

You could solve this with using the modulo 2 room where 2=0=-2 but that isnt of any interest... it just Shows that the geometrical interpretation is two parallel lines (Modulo beeing the same Shows its the same shape just further up

@fubaralakbar6800 Ай бұрын

x+2=x-2 x+2-x+2=0 At this point, I almost said "all real numbers" then I realized that's a PEMDAS issue. Actually: x-x=0, 2+2=4 0=4, therefore no solutions.

@AerialiteOre Ай бұрын

the solution to this problem is the friends we made along the way

@jimtrue1465 29 күн бұрын

I did it by adding 2 to both sides, giving me X + 4 = X, which is also clearly impossible.

@HandleMSR25SudahDiambil 29 күн бұрын

I only need to add *1 Marker line* to make the Formula actually work

@Dethneko 14 күн бұрын

I was going to say X = Root(4) = 2, -2 X+2 = X-2 Root(4) + 2 = Root(4) - 2 (-2) + 2 = (+2) -2 0 = 0 Which, of course, is wrong, since if X = Root(4) you'd --either-- have to solve twice for 2 on both sides and -2 on both sides resulting in two answers: 4 = 0 AND 0 = -4 which are both wrong. Pretty sure you don't get to cherry pick which answer for Root(4) you use on either side, and pretty sure you can't choose the opposite just to make it work. That's also technically brute forcing, and I'm not sure how mathematicians feel about brute forcing. All I knew is the only way for the answer to possibly be true is for X to be -2 on the left and +2 on the right, and the only way to get 2 and -2 to be true at the same time is Root(4).