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# Synthetic Division f(x)=3x^3 -4x^2- 13x-6 watch

1. I got (x+1)(-x^2-3x-6) as the answer. But the right answer is f(x)=(x+1)(x-3)(3x+2). Why?
2. (Original post by Airess3)
I got (x+1)(-x^2-3x-6) as the answer. But the right answer is f(x)=(x+1)(x-3)(3x+2). Why?
Without seeing more working it's tricky to pinpoint exactly where you went wrong.
However, clearly when you factor out of the cubic your leading term in the quadratic needs to be .

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Updated: November 4, 2015
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