Find the zeros of the polynomial function.

f (x) = x3 + 5x2 - 4x - 20

x = - 5, x = - 2, x = 2

x = - 2, x = 2

x = - 5, x = 4

x = 5, x = - 2, x = 2

f (x) = x^3 + 5x^2 - 4x - 20

The zeros of the polynomial function: x^3 + 5x^2 - 4x - 20 = 0

x^3 + 5x^2 - 4x - 20 = 0

x^2 (x + 5) - 4 (x + 5) = 0

(x^2 - 4) (x + 5) = 0

(x + 2) (x - 2) (x + 5) = 0

(x + 2) = 0; x = - 2

(x - 2) = 0; x = 2

(x + 5) = 0; x = - 5

Answer is the first one

x = - 5, x = - 2, x = 2