### Home > CALC > Chapter Ch5 > Lesson 5.5.2 > Problem 5-168

5-168.

Notice that *h*(*x*) is a cubic function. Visualize its graph.

consequently, it is the location of a local max or min of *h*(*x*).

Since *h*(*x*) is a cubic function, there should be another local max or min. Find its location by setting *h* '(*x*) = 0 and solving for *x*.

Recall that maxima and minima are *y*-values. So evaluate *h*(*x*) to find the corresponding *y*-values.