1. (х-2)²+8х=(х-1)(х+1)
х²-4х+4+8х=х² -1
х² -4х+4+8х-х²+1=0
4х==+5=0
4х=-5
х=-5/4
х=-1,25
2. { 6x-2y-5=2x-3y {6x-2y-2x+3y=5 {4x+y=5 {8x+2y=10
{ 5-x+2y=4y+16 {-x+2y-4y=16-5 {-x-2y=11 {-x-2y=11
{7x=21 {x=3 {x=3 {x=3
{-x-2y=11 {-3-2y=11 {-2y=14 {y=-7
<span>Решение на фото............................................................................</span>
(-(2х+3)^2)÷24=(-4х^2-12х-9)÷24
2x - 4x = 0
-2x = 0
x = 0 : (-2)
x = 0