SOLUTION: factor completely x^3 +x^2 +42x x^3 +6x^3 +7x +42 (x-6)(x+7)

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Question 338784: factor completely
x^3 +x^2 +42x
x^3 +6x^3 +7x +42
(x-6)(x+7)
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
x^3 +x^2 +42x
x(x^2+x+42)
x(x^2+7x-6x+42)
x(x(x+7)-6(x+7))
x(x+7)(x-6)
...
x^3 +6x^3 +7x +42
x^2(x+6)+7(x+6)
(x+6)(x^2+7)
..
(x-6)(x+7)
x^2+x-42