# How do you find the solution to the quadratic equation - x^3 - x^2 + 21x + 45=0?

May 5, 2015

−x^3−x^2+21x+45=0
(−x−3)(x+3)(x−5)=0
−x−3=0 or x+3=0 or x−5=0
x=−3 or x=−3 or x=5