Question

15x+15
-------
x^2-1

Answer 1

Factor out the 15 giving you: 15(x+1)
Factor x^2 -1 into: (x-1)(x+1)
You should end up with:
15/(x-1)

Answer 2

Are there any common factors you can take out?

Answer 3

\[\frac{15x+15}{x^2-1}=\frac{15(x+1)}{(x-1)(x+1)}\]Can you cancel the common factor in the denominator and numerator?