Having some issues with these questions:

1.) limit as x ---->4

I know I can factor the numerator to have: (x-4 (x+3).

2.) limit as x---->infinity

Do I find a common denominator first, subtract the fractions, and take it from there?

3.) limit as x---->2

I think I use the conjugate here.

Well, that is how I tacked the problem. Will post my new answers shortly if I think of a better way to answer them

TIA!