China | Can you solve this? | A Nice Math Olympiad Algebra Problem
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- Опубликовано: 19 янв 2024
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How to solve this math problem
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So precise and orderly. Really help this 74 year old to keep his brain percolating. Thanks!
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+ 16 All Scripture is inspired of God+ and beneficial for teaching,+ for reproving, for setting things straight,+ for disciplining in righteousness,+ 17
красиво решает как стихи пишет, с удовольствием смотрю
Thanks, but it is too long.
Once you got 'ab = 3' then you could substitute into the given 'a-b = 2' which would yield 'a^2 - 2a - 3 = 0', thus a = -1 and +3. Finally x+13 = (-1)^3 and (3)^3, that is, x = -14 and +14.
Carefully peruse this equation. There are two cube roots that differ by two. Its easy to find 14 as an answer. Sometimes inspiration is better than perspiration!!
Great solution
I think you can solive this problema with a_b=2 and a.b=3.thank you very much.
La explicación paso a paso, larga, pero aclara muchas dudas y hace razonar para bien. Gracias 👌👏👏
Imagine everlasting life 5:47 + 16 All Scripture is inspired of God+ and beneficial for teaching,+ for reproving, for setting things straight,+ for disciplining in righteousness,+ 17
Bueno, me apasionan las matemáticas, y en ese idioma puedo hablar, también en castellano....y nada más, disculpas.
İ think you chose the largest way 😂
A*2+ab+b2=13
A-b=2
(A-b)^2=a^2+b^2-2ab =4
3ab=9 a.b=3
So (a+b) ^2=16 a+b=4,-4
короче решается
зачем город городить, решается за 2 минуты
имеем 'a-b = 2' находим b = a-2 и сразу подставляем в 'a^2 + 2ab +b^2 = 13 самом начале
решаем квадратное уравнение и находим a = -1 и +3.
затем возводим a^3 = x+13 и решаем находим x
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You ought have applied quadratic solution from where you got ab=3 and a-b=3 to abridge the long route but great work
Yes, I was also thinking that.... He perhaps wants to make his video longer... 😅😅
Lovely solution
Bravo!
asnwer=13 /2
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x = 14 or x = - 14
Yep. Solved it before the video even loaded
X=14
wait i don't get it. why do we have to do the expansion at 4:45?
Il est faux de dire que √16 = ±8, la racine d'un nombre étant toujours positif, il faut dire ±√16 = ±8, je remarque que tu fais souvent la même erreur 🙄🙄
Зачем городить такой огород? Решается элементарнр заменй переменной x´+13´=t^3.
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