Question

решите уравнение (x-1)(x^2+6x+9)=x^2+12x+27

Answer 1

(x-1)(x^2+6x+9)=x^2+12x+27
(x-1)(x+3)^2=(x+9)(x+3)
(x-1)(x+3)^2-(x+9)(x+3)=0
(x+3)(x^2+2x-3-x-9)=0
(x+3)(x^2+x-12)=0
(x+3)(x+4)(x-3)=0
x1=-3
x2=-4
x3=3