Question 196768: how do you factor an equation like this: x^3+3x^2+3x-9?
Answer by RAY100(1637)   (Show Source):
You can put this solution on YOUR website! this technique is called grouping
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x^3 +3x^2 +3x +9
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x^2 ( x+3) + 3 (x+3)
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(x^2 +3) * (x+3),,,,,,sometimes hard to see this step, like ab +cb = b(a +c)
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(x^2 +3) (x+3)
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checks with x=1, original = answer = 16
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IF problem really does have a "-9", check for another (-) sign
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if not , X^3 +3(x^2 +x -3)
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Use quadratic eqn
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x^3 +3 ( x-1.3) (x+2.3)
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