ANSWER
(1,4)
(-∞,-3)
EXPLANATION
The interval where a portion of the graph is below the x-axis is where the graph is negative.
From the graph , the curve is below the x-axis on the interval (-∞,-3). Hence the graph is negative on this interval.
Also the graph is below the x-axis on the interval (1,4). This is also another interval where the graph is negative.
