Answer
$(-\infty,1]U[2,3]$
Work Step by Step
Step 1.Identify boundary points (zeros) as $x=1,2,3$ which divide the x-axis into four intervals $(-\infty,1],[1,2],[2,3],[3,\infty)$
Step 2. Choose test values in each interval $x=0,1.5,2.5,4$ and test the inequality to get $True,\ False,\ True, \ False$
Step 3. Thus the solution intervals are $(-\infty,1]U[2,3]$