SOLUTION: x3+3x2+5x+15

SOLUTION: x3+3x2+5x+15

Algebra.Com

Question 714726: x3+3x2+5x+15
Answer by DrBeeee(684) (Show Source): You can put this solution on YOUR website!
Given:
(1)
Now factor out of the first two terms and 5 out of the third and fourth terms to get
(2)
Now factor (x+3) out of (2) and get
(3)
Set (3) equal to zero gives us the three roots
(4) x = (-3,+i,-i)
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