SOLUTION: Please help me to solve this problem: Multiply and, if possible simplify. x-7/(x+4)^2 * x^2-3x-28 / (x-7)^2

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Question 285082: Please help me to solve this problem:
Multiply and, if possible simplify.
x-7/(x+4)^2 * x^2-3x-28 / (x-7)^2
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
x-7/(x+4)^2 * x^2-3x-28 / (x-7)^2
x-7 / (x+4)^2 * (x^2-7x+4x-28) / (x-7)^2
(x-7)/(x+4)^2 * (x(x-7)+4(x-7)) /(x-7)^2
(x-7)/(x+4)^2 * (x-7)(x+4)/(x-7)^2
(x-7)(x-7)(x+4)/ (x+4)^2*(x-7)^2
=1/(x+4)