Решите уравнение. (х+2)^2=(х+5)^2

a²-b²=(a-b)(a+b) (х+2)²-(х+5)²=0 ((x+2)-(x+5))((x+2)+(x+5))=0 (х+2-х-5)(х+2+х+5)=0 -3*(2х+7)=0 2х+7=0 2х=-7 х=-7:2 х=-3,5

(х+2)²=(х+5)² х²+4х+4=х²+10х+25 4х+4=10х+25 4х-10х=25-4 -6х=21 х=-7/2 х=-3.5