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Write as (a,b) = (8,-9) or (a,b) =(-9,8 ). What the solutions as written say is (8,-9) =(-9,8) which is incorrect. Also only One solution is needed Since by symmetry if (8,-9) is a solution then so is (-9,8).
Again, only one solution is needed since you can appeal to symmetry to get the other
@is772822 күн бұрын
@@garrettvanmeter5831 Agree
@margotconard764417 күн бұрын
a^2 = 73 + b b^2 = 73 + a the nearest square of an interger that is larger than 73 is 81 by inspection if a equals 9 and b equals -8, the problem is solved.
It took me around 10 sec to find the solution. Glory to Ukraine.
@LogicRk24 күн бұрын
Superb ❤
@Frankkusi-se2rf13 күн бұрын
Please there is a problem in the factorization
@user-pd7js7cy9m23 күн бұрын
Hellooooo 😊). A bad solution to an easy problem. After 2:40 we substitute (1) a=b and (2) a=-b-1 in (0) a^2-b-73=0 . We get : (0,1) b^2-b-73=0 , and (0,2) b^2+b-72=0 . Therefore : (3) b1=[ 1-sqrt(293) ]/2 , b2=[1+sqrt(293) ]/2 (4) {thanks to Vietta } : b3=-9 , b4=8 , we substitute (3) in (1) and (4) in (2) . We get the right answer. With respect to, Lidiy
@ashtongreenidge20 күн бұрын
Recall the condition that a is not equal to b.
@als2cents67924 күн бұрын
In your solution validation you only plugged values in one of the simultaneous equation. You really need to plug into both of the original simultaneous equations to validate that the solution is valid.
@lugracias24 күн бұрын
👍🌼
@user-ft8ws5tt1x9 күн бұрын
В первую секунду я подумал, что a=b, и во вторую секунду меня обломали)
@duncan-rmi21 күн бұрын
I did it in my head. but what sort of pen is that? do they do them in other colours?
@soniamariadasilveira700324 күн бұрын
I loved this problem!
@user-lz9xu2bn8p24 күн бұрын
🎉
@arshadshaikh590519 күн бұрын
a = b = 9.05863
@dellagobaikal82052 күн бұрын
The proposed solution is too much complicated. Below proposed by G is more technical.
@user-jk4dn1re9r18 күн бұрын
Очень интересно. Спасибо
@user-jk4dn1re9r18 күн бұрын
Хотя есть и более простые методы решения, но эта игра с формулами мне понравилась.
@learncommunolizer13 күн бұрын
Your welcome
@evgenysapotnitsky823418 күн бұрын
Задача, на самом деле, очень простая. Вычитаем второе уравнение из первого и после преобразований получаем (a-b)(a+b+1)=0. Отсюда следует a=-1-b (a не равно b по условию задачи). Подставляем полученное выражение для "a" во второе уравнение и получаем b^2+b-72=0. Решаем квадратное уравнение и получаем ответ: 1) b=8, a=-9; 2)b=-9, a=8. Тринадцать минут на такую задачу - очевидный перебор))
@evbdevy35215 күн бұрын
Я тоже решил именно так,отнял от(1) (2).Получил такое же кв.урав-е.
@evbdevy35215 күн бұрын
Потратил не более 5 мин.На Олимп.ге тянет
@godot-lee14 күн бұрын
a = 8, b = -9 or a = -9, b = 8
@user-we7eh6lk8m9 күн бұрын
а=-9, b=8
@user-xq8cg3gf5f21 күн бұрын
81-8=73 64+9=73
@TWJRPGGamming2 күн бұрын
a=-9 b=8
@lisandro7324 күн бұрын
There are two more real, when a and b are irrational
@user-xh3ih4ks9yКүн бұрын
a=8 b=-9
@user-sx6vo6ne5f24 күн бұрын
:))))))))) Jak można tak rozwlekać proste zadanie ?!!! było wstawić a=-b-1 do drugiego równania i wynik gotowy z prostego równania kwadratowego b=-9 ; 8 a=8 ; -9
@YAWTon21 күн бұрын
The same problem with the same solution was uploaded to YT a short while ago. I think this guy just made a copy of that clip... terribly boring, and bad from a didactic point of view.
@user-xq8cg3gf5f21 күн бұрын
а=9 б=-8 !!!
@vanessawelles476023 күн бұрын
easy to guess the solution by saying what number squared is is slightly greater than 73. result -9 and 8
@salvatorechiocca237522 күн бұрын
A
@user-md4br9kj3i22 күн бұрын
Всё конечно красиво, но зачем так сильно раскладывать и расписывать очевидные вещи?
@Tiberius8822 күн бұрын
Long winded. It doesn't take 13 mins to solve this!
@YAWTon21 күн бұрын
You can halve the time by playing the clip at double speed...😊