A partial solution set is given for the polynomial equation. Find the complete solution set. (Enter your answers as a comma-separated list.)

Question

x^3 + 3x^2 − 14x − 20 = 0; {−5}

Answer 1

x^3 + 3x^2 − 14x − 20 = (x+5)(x^2-2x-4)

Now just solve the quadratic for the other two values of x.