Answer
zeros,
zeros,
cut points,
see figure for completed table.
$(-\infty,-4)$,
$[-2,1]$,
$(3,\infty)$
Work Step by Step
1. Fill the first three blanks as: zeros, zeros, cut points,
2. The cut points are $-4,-2,1,3$, fill in the signs in the table provided as shown in the figure.
3. Using the end results from the table, fill in the rest of the blanks sanctifying the inequality as $(-\infty,-4),[-2,1],(3,\infty)$