Question 971724

I am working on dividing a rational expression with another rational expression and I am having issues.  Here is the problem:

x^2+3x-28/x^2-36 divided by x^2-13x+36/x^2-11x+30

Now, I understand that I need to invert the divisor so now thw problem looks like this:
x^2+3x-28/x^2-36 divided by x^2-11x+30/x^2-13x+36

Now, after I've done the steps, I end up with:
(x+7)(x-4)/(x-9)(x+4)times (x-6)(x-5)/(x-9)(x-4)
 Now i have the problem. The answer key has the answer as (x-7)(x-4)/(X-6)(X-9)
Since I already inverted the divisor earlier, how does the answer key show (x-6) as a denominator when its a numerator and Where's (x-5)? Im sorry for the long explanation. Help me please!
<pre>DUPLICATE!!
See your other post!!