Question

Решите уравнение (x-4)(x+2)-(x-5)(x+6)=-x

Answer 1

(х-4)(х+2)-(х-5)(х+6)=-х
х^2+2х-4х-8-(х^2+6х-5х-30)=-х
х^2+2х-4х-8-(х^2+х-30)=-х
х^2+2х-4х-8-х^2-х+30=-х
2х-4х-8+30=0
-2х+22=0
-2х=-22
х=11