Question

решите уравнение (х+10)^2=(2-х)^2

Answer 1

(х+10)²=(2-х)²
х²+20х+100=4-4х+х²
х²+20х+4х-х²=4-100
24х=-96
х=-4

Answer 2

(х+10)^2=(2-х)^2
(х+10)^2-(2-х)^2=0
(х+10+2-х)(ч+10-2+ч)=0
12(2х+8)=0
х=-4