SOLUTION: 2. Multiply and simplify: x^2-x-20 * x^2+7x+10 ___________ ___________ x^2-3x-10 x^2+4x-5

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: 2. Multiply and simplify: x^2-x-20 * x^2+7x+10 ___________ ___________ x^2-3x-10 x^2+4x-5       Log On


   

Question 34002: 2. Multiply and simplify:

x^2-x-20 * x^2+7x+10

___________ ___________

x^2-3x-10 x^2+4x-5
Answer by elima(1433) About Me  (Show Source):
You can put this solution on YOUR website!
You first need to factor each polynomial;
x%5E2-x-20%2Fx%5E2-3x-10 * x%5E2%2B7x%2B10%2Fx%5E2%2B4x-5
%28x-5%29%28x%2B4%29%2F%28X-5%29%28x%2B2%29*%28x%2B5%29%28x%2B2%29%2F%28x%2B5%29%28x-1%29
Now you cancel out;
%28x%2B4%29%2Across%28%28x-5%29%29%2Fcross%28%28x-5%29%29%2F%28x%2B2%29*%28x%2B2%29%2Across%28%28x%2B5%29%29%2Fcross%28%28x%2B5%29%29%2F%28x-1%29
%28x%2B4%29%2F%28x%2B2%29*%28x%2B2%29%2F%28x-1%29
Now cross cancel;
%28x%2B4%29%2Fcross%28%28x%2B2%29%29*cross%28%28x%2B2%29%29%2F%28x-1%29
%28x%2B4%29%2F1*1%2F%28x-1%29
multiply;
%28x%2B4%29%2F%28x-1%29
Hope you get it
=)