Answer
$[-3,-2]\cup[-1,\infty)$
Work Step by Step
Step 1. The boundary points are $x=-3,-2,-1$
Step 2. Using test points to examine signs across the boundary points, we have
$...(-)...(-3)...(+)...(-2)...(-)...(-1)...(+)...$
Thus the solutions are $-3\leq x\leq -2$ plus $x\geq -1$
Step 3. We can express the solutions on a real number line as shown in the figure.
Step 4. We can express the solutions in interval notation as $[-3,-2]\cup[-1,\infty)$
