college algebra
posted by Dee .
A partial solution set is given for the polynomial equation. Find the complete solution set. (Enter your answers as a commaseparated list.)
x^3 + 3x^2 − 14x − 20 = 0; {−5}

x^3 + 3x^2 − 14x − 20 = (x+5)(x^22x4)
Now just solve the quadratic for the other two values of x.