Question 683295
<pre>
f(x) = {{{(x+2)/(x^2-4)}}}

The denominator cannot equal to 0, so if we set it = 0,
its solution will tell us which values of x are not
part of the domain.

        x² - 4 = 0 
(x - 2)(x + 2) = 0

x = 2,  x = -2.

So the domain cannot contain either of those values of x, but
contains all other values of x, so the domain is

(-oo, -2) U (-2,2) U (2, oo)

Edwin</pre>