SOLUTION: 2x^3+7x^2-12x-45=0

Algebra ->  Equations -> SOLUTION: 2x^3+7x^2-12x-45=0      Log On


   

Question 19450: 2x^3+7x^2-12x-45=0
Answer by khwang(438) About Me  (Show Source):
You can put this solution on YOUR website!
Solve +2x%5E3%2B7x%5E2-12x-45=0
Factor 2x^3+7x^2-12x-45
=+2x%5E2%28x+%2B+3%29+%2B+x%5E2+-+12+x+-45
= +2x%5E2%28x+%2B+3%29+%2B+%28x+%2B3%29%28x-15%29
= +%28x%2B3%29%282x%5E2+%2B+x+-15%29+
= %28x%2B3%29%28x%2B3%29+%282x+-5%29+
= %28x%2B3%29%5E2+%282x+-5%29+

So, the roots are ...
(or use synthetic division)

Kenny