I can't figure this out, can someone please help me?
Add
6/(x-4)+ 6/(x+4)
Create a common deniminator.
6/(x-4)+ 6/(x+4) =
[6(x+4) + 6(x-4)]/[(x+4)(x-4)]
= 12x/(x^2-16)
It isn't much simpler than the first version, but it may be what they want.