Question

памагити решить, пожалуйстаа​

Answer 1

1)

x^2 - y^2 - 6x + 9 = (x-3)^2 - y = (x - 3 - y) * (x - 3 + y)

2)

x^3 - 3x^2 - 4x + 12 = 0

x^2 * (x - 3) - 4 * (x - 3) = 0

(x - 3) * (x^2 - 4) = 0

(x - 3)  * (x - 2) * (x + 2) = 0

Отсюда, x1 = -2 ; x2 = 2; x3 = 3