Question 26502
First, factor the problem out!

2x^2-x-3/ 3x^2+7x+4  *  3x^2-11x-20/  4x^2-9

You will get
(2x-3)(x+1)/(3x+4)(x+1) * (3x+4)(x-5)/(2x+3)(2x-3)

Cancel Out the top numbers with the bottom numbers on either side and your left with

x-5/2x+3