SOLUTION: Multiply the fractions. Be sure to simplify completely. 2x^2-x-3 3x^2-11x-20 --------- X ----------- - = 3x^2+7x+4 4x^2-9

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Multiply the fractions. Be sure to simplify completely. 2x^2-x-3 3x^2-11x-20 --------- X ----------- - = 3x^2+7x+4 4x^2-9      Log On


   

Question 64780: Multiply the fractions. Be sure to simplify completely.
2x^2-x-3 3x^2-11x-20
--------- X ------------- =
3x^2+7x+4 4x^2-9
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
2x^2-x-3 3x^2-11x-20
--------- X ------------- =
3x^2+7x+4 4x^2-9
:
:
%282x%5E2+-+x+-+3%29%2F%283x%5E2+%2B+7x+%2B+4%29 * %283x%5E2+-+11x+-+20%29%2F%284x%5E2+-+9%29
:
All of these will factor, do that first:
:
%28%282x-3%29%28x%2B1%29%29%2F%28%283x%2B4%29%28x%2B1%29%29 * %28%283x%2B4%29%28x-5%29%29%2F%28%282x-3%29%282x%2B3%29%29
:
Observe that the following will cancel:(2x-3),(x+1),(3x+4), eliminates
the first faction (actually becomes 1), leaves us with:
:
%28x-5%29%2F%282x%2B3%29
:
You can see no multiplying actually took place. Could you follow this OK?