SOLUTION: please help me multiply? 2x^2-x-3 over 3x^+7x+4 times 3x^2-11x-20 over 4x^2-9

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: please help me multiply? 2x^2-x-3 over 3x^+7x+4 times 3x^2-11x-20 over 4x^2-9      Log On


   

Question 75937: please help me multiply?
2x^2-x-3
over
3x^+7x+4
times
3x^2-11x-20
over
4x^2-9
Answer by Cintchr(481) About Me  (Show Source):
You can put this solution on YOUR website!
+%282x%5E2-x-3%29%2F%283x%5E2%2B7x%2B4%29+%2A+%283x%5E2-11x-20%29%2F%284x%5E2-9%29+
Since we are multiplying we can combine the two fractions.
+%28%282x%5E2-x-3%29%283x%5E2-11x-20%29%29%2F%28%283x%5E2%2B7x%2B4%29%284x%5E2-9%29%29+
Factor all parts

Cancel like quantities ... (x+1)
+%28%282x-3%29%283x%2B4%29%28x-5%29%29%2F%28%283x%2B4%29%282x%2B3%29%282x-3%29%29+
Cancel like quantities ... (2x-3)
+%28%283x%2B4%29%28x-5%29%29%2F%28%283x%2B4%29%282x%2B3%29%29+
Cancel like quantities ... (3x+4)
+%28x-5%29%2F%282x%2B3%29+
Done