#### Answer

All real numbers except $x=-7 \space \text{and} \space x=9$.

#### Work Step by Step

We are asked to find the domain of the function here. In order to solve this problem, we look for things in the function which may limit its domain, such as square roots, log functions, and dividing by 0. Because x=-7 and x=9 result in divide by 0 errors, they should not be included in the domain.