Question

find the domain of the rational function
c(x)=-4/x^2-4

Answer 1

Whenever you have a domain question ask yourself the following things:
1. Do I have a fraction? If yes, then do NOT let the denominator be 0.
2. Do I have a square root? If yes, then do NOT let the inside be less than 0.

Answer 2

So for your question the only thing restricted is x^2 - 4 does not = 0. solve for x and you'll see what you cannot let x equal