Answer:
(-∞, -2) ∪ (0, ∞)
Step-by-step explanation:
A function is decreasing when its slope is negative, meaning that as x increases, y decreases.
From observation of the graphed function, the turning points are when x = -2 and x = 0, and the slope of the function is negative on the intervals (-∞, -2) and (0, ∞).
Therefore, the function is decreasing on the intervals:
[tex]\LARGE\boxed{\boxed{(-\infty, -2) \cup (0, \infty)}}[/tex]