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Олеся18022000
@Олеся18022000
July 2022
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СРОЧНО, РЕШИТЕ,ПОЖАЛУЙСТА:(х+7)^3=49(х+7).
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Vikyvikk
Решение:
(X+7)(x^2+14x+49)=49(x+7)
(X+7)(x+7)^2=49(x+7)
49=((x+7)(x+7)^2)/(x+7)
(X+7)^2=49
X^2+14x+49-49=0
X^2+14x=0
X(x+14)=0
X=0
X=-14
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Answers & Comments
(X+7)(x^2+14x+49)=49(x+7)
(X+7)(x+7)^2=49(x+7)
49=((x+7)(x+7)^2)/(x+7)
(X+7)^2=49
X^2+14x+49-49=0
X^2+14x=0
X(x+14)=0
X=0
X=-14