Question 62788
{{{(n^2-n-20)/2n^2 * (n^2+5n)/(n^2-25)}}}


I did this thus far but I know it is incorrect. 

(n+4)(n-5) n(n+5)
--------- * ------
2n^2 (n-5)(n-5) 
This just doesn't look right. 


You are certainly on the right track so I won't finish it off. Your error is that n^2-25 factorises as (n-5)(n+5). Fix that and you should be able to complete the rest without difficulties.