SOLUTION: one factor of x^3 + 2x^3 - 11x - 12 is x + 4. Find the remaining factors.

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Question 287848: one factor of x^3 + 2x^3 - 11x - 12 is x + 4. Find the remaining factors.
Answer by Edwin McCravy(20056)   (Show Source): You can put this solution on YOUR website!
one factor of is .
Find the remaining factors.


Since x + 4 is a factor, then x = -4 is a zero.  Use synthetic
division with -4

 -4 |  1  2 -11 -12
    |    -4   8  12
       1 -2  -3   0

So we have factored the polynomial as



Now we factor the trinomial:


  

Edwin
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