Question

x^2-x-72/x^2-16x+64 * x-8/x-9 multiply and simplify

Answer 1

start by factoring out the top and the bottom... then cancel and u should get somthing simpler
do that first and post and ill guide u through

Answer 2

do you know how to factor quadratic equations?

Answer 3

see first of all u must know the quadratic equation:
\[ax^2 + bx +c = (-b \pm \sqrt{b^2-4ac})\div2a\]

Answer 4

... he doesnt need quadratic