Answer
$(-\infty,-2)\cup(-1,1)\cup(1,\infty)$
Work Step by Step
1. Since the function is already factorized, just identify the cut points and build up the sign table.
2. Cut points $-2,-1$, the numerator will always be positive, but $x\ne1$, see table.
3. Solution: $(-\infty,-2)\cup(-1,1)\cup(1,\infty)$
