Answer
Domain: X is on the interval ($-\infty$, -3) U (-3, $\infty$)
Work Step by Step
A denominator cannot be zero, so the domain is all real numbers except the x value where the denominator is 0.
In this problem the denominator is x + 3, so:
x + 3 = 0
x = -3
Therefore, the domain is all real numbers except where x = -3.