SOLUTION: I need some help with these problems I am having problems Factor completely x^3-x^2-20x and also solve: 3/x-1=6/x+2 Thank you

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Question 93969: I need some help with these problems I am having problems
Factor completely x^3-x^2-20x
and also
solve: 3/x-1=6/x+2
Thank you
Answer by yannick(6) About Me  (Show Source):
You can put this solution on YOUR website!
1) x%5E3-x%5E2-20x
We can first factorise it by x
x%5E3-x%5E2-20x=x%28x%5E2-x%2B20%29
and x%5E2-x%2B20=%28x%2B4%29%28x-5%29
So
x%5E3-x%5E2-20x=x%28x%2B4%29%28x-5%29
2) 3%2Fx-1=6%2Fx%2B2
%283-x%29%2Fx=%286%2B2x%29%2Fx
Is the same as,
3-x=6%2B2x
-x-2x=6-3
-3x=3
x=-1