(2х-5)²-(2х-3)(2х+3)=0 (3х+5)(3х--1)²=10 2(2х+1)²-8(х+1)(х-1)=34

(2x-5)²-4x²+9=4x²+25-20x-4x²+9=34-20x
34-20x=0
20x=34
x=1.7

9x²-25-(3x-1)²=9x²-25-9x²-1+6x=6x-25
6x-25=10
6x=35
x=5.5/6

2(2x+1)²-8(x²-1)=8x²+2+8x-8x²+8=8x+10
8x+10=34
8x=24
x=3