Question

Реши уравнение
(3x−3)^2−(x−15)^2=0

Answer 1

(3х-3-х+15 )×(3х-3+х-15=0
(2х+12)×(4х-18)=0
2х+12=0
2х= -12
х= -6

4х-18=0
4х=18
х=4,5