Mathematics Video This is the first half of a short video explaining, in true and honest and accessible terms, why negative times negative is positive. At last!
Пікірлер: 30
@volvol110 жыл бұрын
That was a really great explanation. Ah, the JOY OF LEARNING, of insight!!!
@alittax2 жыл бұрын
Indeed, it is a great sensation. :)
@hasnaa73162 жыл бұрын
YOU'RE AWESOME i've been looking for the explanation behind this for a long time thank you.
@adamzheng43627 жыл бұрын
2:20 It makes sense because -3 groups would, essentially, be repeated subtraction from zero, which is 0 - 5 - 5 - 5= -15
@abdulhakkim39472 жыл бұрын
U r awesome 👏
@rhoadess11 жыл бұрын
I tried mirror reflections upon the number line? kinda works. So think of (-1*) as a operator that reflects a number to the opposite direction. If you do this an even number of times, you end up in the original direction.
@aidenayyash80673 жыл бұрын
thx man i understood it easily
@edwardschneider70359 жыл бұрын
yet you failed to explain why; you start with an assumption but never explain why the assumption is valid
@TheBasikShow7 жыл бұрын
Really just because the extension makes sense. It feels nice for things to be commutative (AxB=BxA) and distributive (Ax(B+C)=AxB+AxC, which is basically what he's doing with the rectangles). As in a lot of math, the axioms we use are flimsy, but the ones most people use are the ones intuitive to us. The assumption is valid because we /say/ it's valid, and we say it's valid because we like patterns to stay the same.
@KKKK-jr1nm4 жыл бұрын
@@TheBasikShow thanks for explaining!!
@leonardschrock3805 жыл бұрын
This is interesting. My thinking on this question is quite different. If I change a sign in a multiplication problem, then the sign of the answer must change. All plus numbers multiplied give a plus answer. If you change one number in the problem then the sign of the answer changes to minus. If you change two signs in the problem then the two changes of the answer sign will come back to positive. More numbers work as well. (-2)x(-2)x(-2)=(-8).
@MrBrix36 жыл бұрын
awesome explanation...........Thanks so much
@ikemuoma84954 жыл бұрын
Nicely done. 👍👍
@Picasanta11 жыл бұрын
My God!!! Thank you very very much!
@annabizaro-doo-dah5 жыл бұрын
Thumbs up for the visual representation of the two posative groups of numbers from different visual perspectives.
@Bredrin9011 жыл бұрын
Dr. Tanton: Thanks for these great videos and the great PD on "Exploding Dots"!
@MrBrix36 жыл бұрын
Headed to your website!!!!
@1DARBY19 жыл бұрын
Great explanation thanks
@whiteaccau14 жыл бұрын
Very helpful, thanks.
@DrJamesTanton13 жыл бұрын
@curvaceousss Thanks! - J
@lilmizawesome112 жыл бұрын
you rock! This video helped a lot!
@2001mathnerd10 жыл бұрын
well done sir.
@catirerubio4 жыл бұрын
You seem to be pulling numbers out of the air then creating plus or minus numbers to make them work via the square. Why cannot you use the original numbers in the formula? This does not compute.
@GrandTheftAutowkthru7 жыл бұрын
Think of +ve and -ve Numbers like Mountains where +ve numbers go up and -ve Numbers go down Say your mountain have height of 5000 or +5000 when you MULTIPLY -1 or ( -1 - 1 -1 .... ) 5000 times Your Mountain gets Inverted and looks like the letter n that a letter u When you times -1 again it goes up to a u (-1) * (-1) = 1
@DesmoRob12 жыл бұрын
Does that video explain something? oO
@abdulhakkim39472 жыл бұрын
After 12 years 275 likes !,,,,horrible
@GreaterDeity12 жыл бұрын
Hm... time to get a dictionary.
@rustymason38603 жыл бұрын
Please get a pop filter.
@TheConqueror0095 жыл бұрын
A terrible argument! The problem with math is that it is based off of the concept of rationality and consistency!