Решите уравнение

В) x²-8 = (x-8) (2x+1)

Г) (2x-1) ²-1=x (x+2)

В)

х ^2 - 8 = 2x^2 - 16x + x - 8

x^2 - 2x^2 + 16x - x + 8 - 8 = 0

-x^2 + 15x = 0

x^2 - 15x = 0

x (x - 15) = 0

x1 = 0

x2 = 15

г) (2 х - 1) ^2 - 1 = x (x + 2)

4x^2 - 4x + 1 - 1 = x^2 + 2x

4x^2 - x^2 - 4x - 2x = 0

3x^2 - 6x = 0

3x^2 = 6x

x = 6x : 3x

x = 2