Question

Simplify the sum. State any restrictions on the variables

Answer 1

you will want to create a common denominator so you can add them.
what can you do to x+3 to make it equal x^2-9?

Answer 2

@cherio12 Would you times x + 3 by x + 3?

Answer 3

close but (x+3)(x-3)=x^2=3x-3x-9=x^2-9
So multiply by (x-3)/(x-3) to the first term to get a common denominator