(2х+1)²-3(х-5)²=(х+3)(х-3) помогите плс. Created by judoshka72. algebra-ru

(2х+1)²-3(х-5)²=(х+3)(х-3) помогите плс...

judoshka72 @judoshka72

July 2022 1 14 Report

(2х+1)²-3(х-5)²=(х+3)(х-3) помогите плс

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Lesben

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( 2х + 1 )^2 - 3( х - 5 )^2 = ( х + 3 )( х - 3 )
4х^2 + 4х + 1 - 3( х^2 - 10х + 25 ) = х^2 - 9
4х^2 + 4х + 1 - 3х^2 + 30х - 75 = х^2 - 9
х^2 + 34х - 74 = х^2 - 9
34х = 65
х = 1 31/34

2 votes Thanks 2

Lesben 65/34= 34/34 + 31/34 = 1 31/34

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