(x-1)(x+2)=10 пожалуйста помогите. Created by gggggoooo. algebra-ru

(x-1)(x+2)=10 пожалуйста помогите...

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August 2022 2 8 Report

(x-1)(x+2)=10 пожалуйста помогите

Evgenia4836

Verified answer

x²+2x-x-2=10

x²+x-12=0

D= 1+48=49

x1= (-1+7)/2= 3

x2= (-1-7)/2= -4

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d3782741

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$\left(x-1\right)\left(x+2\right)=10\medskip\\x^2+x-2-10=0\medskip\\x^2+x-12=0\medskip\\\left(x-3\right)\left(x+4\right)=0\medskip\\\left[\begin{gathered}x=3\\x=-4\end{gathered}$

Ответ. $x\in\left\{3;-4\right\}$

1 votes Thanks 1

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