Now repeat the procedure to find the right x-intercept. We will use a left bound of -2, a right bound of -0.5, and a guess of -1.
The x-intercepts are approximately x = -2.7002 and x = -1.1601, rounding to four decimal places. From the graph, we observe that the y-values will be positive if x < -2.7002
or if x > -1.1601, and will be negative if -2.7002 < x < -1.1601.
Therefore, f(x) > 0 on the interval |
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and f(x) < 0 on the interval (-2.0072, -1.1601),
approximately.
