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prostoalino4ka1999
@prostoalino4ka1999
August 2022
2
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решите уравнение (x+7)^2+(x-6)^2=2x^2
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Denis55
Verified answer
4 votes
Thanks 4
Juliaa21
X²+14x+49+x²-12x+36=2x²
x²+14x+49+x²-12x+36-2x²=0
2х+85=0
2х=-85
х=-85/2
х=-42,5
1 votes
Thanks 1
Denis55
Джулиа
Denis55
у тебя ошибка при раскрытии второй скобки
Denis55
ты умножила на 4
Juliaa21
точно,бывает
Denis55
(а+б)^2 = a^2 + 2ab + b^2
Juliaa21
я знаю эту формула,просто сделала ошибку,я поняла уже
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Answers & Comments
Verified answer
x²+14x+49+x²-12x+36-2x²=0
2х+85=0
2х=-85
х=-85/2
х=-42,5