(2х-5)²-(2х-3)(2х+1)=4
4х²+20х+25-4х²+6х-2х+3-4=0
24х=-24
х=-1.
4х^2+20x+25-(4x^2+2x-6x-3)=4
4х^2+20x+25-4x^2-2x+6x+3=4
24x=4-25-3
24x=-24
x=-24/24
x=-1
(2х-5)²-(2х-3)(2х+1)=4
4х²+20х+25-4х²+6х-2х+3-4=0
24х=-24
х=-1.
4х^2+20x+25-(4x^2+2x-6x-3)=4
4х^2+20x+25-4x^2-2x+6x+3=4
24x=4-25-3
24x=-24
x=-24/24
x=-1