what are the roots for x^3-13x-12?

Answer 1

Y = x^3 - 13x - 12 = 0.
X = -1, x+1 = 0.

(x^3 - 13x - 12)/(x+1) = x*2 - x - 12.
x^3-13x-12 = (x+1)(x^2-x-12).
Factor the Quadratic:
(x+1)(x+3)(x-4) = 0.

x+3 = 0, X = -3.

x-4 = 0, X = 4.

The roots are: X = -1, -3, and 4.

Answer 2

x3-13x+12/x-1