Answer
Domain: X is on the interval ($-\infty$, -2) U (-2, 2) U (2, $\infty$)
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 $x^{2}$ - 4, so:
$x^{2}$ - 4 = 0
This can be factored into:
(x + 2)(x - 2) = 0
x = -2, 2
Therefore, the domain is all real numbers except where x = -2 and x = 2.
