120\%
...............................
X²-xy-4x+4y=(x²-xy)-(4x-4y)=x(x-y)-4(x-y)=(x-y)(x-4)
ab-ac-bx+cx+c-b=(ab-ac)-(bx-cx)+(c-b)=a(b-c)-x(b-c)-(b-c)=(b-c)(a-x-1)
<span>-2ab³ * 3a² * b</span>⁴=-6a³b⁷
Решение смотри на фотографии
8х-3(2х-3)=7х-2(5х+8)
8х-6х+9=7х-10х-16
2х-7х+10х=-16-9
5х=-25
х=-25/5
х=-5