$(-\infty, -3] \cup (4,+\infty)$
Work Step by Step
$(-\infty, -3] \cup (4,+\infty)$ Rewrite the number line using the appropriate symbols corresponding to the interval notation. In this case we use the union symbol because there is a "gap" in the graphed solution set. Remember that a parentheses must be used when enclosing infinity.