Question

Ребят,помогите пожалуйста.

1) (x-1)^2 = -4x
2) (x-2)^2 = -8x
3) x^3 - 7x +6 = 0

Answer 1

1) (x-1)^2 = -4x
x^2 -2x +1 +4x =0
x^2+2x+1 =0
(x+1)^2 =0
x = -1
2) (x-2)^2 = -8x
x^2 - 4x + 4 + 8x = 0
(x+2)^2 = 0
x=-2