SOLUTION: Factor {{{3x^3+15x^2+4x+20}}}
Algebra.Com
Question 48982: Factor
Answer by Nate(3500) (Show Source): You can put this solution on YOUR website!
a = 1,2,4,5,10,20
b = 1,3
Possible Roots: +-a/b = +- 1,2,4,5,10,20,1/3,2/3,4/3,5/3,10/3,20/3
Normally, you would try them out, but for a quicker way, look at the graph:
-5|.....3......15.......4........20
..........3.......0........4.......0
(x + 5)(3x^2 + 4)
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