We have the following expression:
(x ^ 2-9 / x ^ 2 + 2x-3) / (x ^ 2 + 6x-27 / x ^ 2-10x + 9)
Let's rewrite the expression:
(((x-3) * (x + 3)) / ((x + 3) * (x-1))) / (((x + 9) * (x-3)) / ((x-9) ) * (x-1)))
We cancel similar terms:
(1/1) / ((x + 9) / (x-9))
Doing double c we have:
(x-9) / (x + 9)
Answer:
B x-9 / x + 9