Дайте корень уравнения -x^2+4x+3=x^2-x-(1+2x^2). Created by shecterka2004. algebra-ru

Дайте корень уравнения -x^2+4x+3=x^2-x-(1+2x^2)...

shecterka2004 @shecterka2004

July 2022 1 9 Report

Дайте корень уравнения -x^2+4x+3=x^2-x-(1+2x^2)

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papagenius

Ответ:

Объяснение:

$\begin{gathered}-{x^2}+4x+3={x^2}-x-(1+2{x^2})\hfill\\-{x^2}+4x+3={x^2}-x-1-2{x^2}\hfill\\-{x^2}+4x+3-{x^2}+x+1+2{x^2}=0\hfill\\5x+4=0\hfill\\5x=-4\hfill\\\boxed{x=-\frac{4}{5}=-0.8}\hfill\\\end{gathered}$

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