2 (2х +1)^2 -8(х+1)(х-1)=34 решить уравнение. Created by goldsvetlana140. algebra-ru

2 (2х +1)^2 -8(х+1)(х-1)=34 решить уравнение...

goldsvetlana140 @goldsvetlana140

July 2022 1 8 Report

2 (2х +1)^2 -8(х+1)(х-1)=34
решить уравнение

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zhenyaM2002

Verified answer

2 (2х+1)^2- 8(x+1)(x-1)=34
2 *( 4x^2+2*2x*1+1^2) - 8*(x^2-1^2)=34
8^2+8x+2-8x^2+8=34
(8x^2-8x^2)+8x+(2+8)=34
8x+10=34
8x=34-10
x=24:8
х=3
Проверим: 2*(2*3+1)^2-8*(3+1)(3-1)=34
2*49- 8*4*2=34
98-64=34
34=34

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