## Detailed description

- f(x) = −2(x + 2)cubed (x − 2), graph of quartic function, local maximum at (1,54), x-intercepts at (−2,0) and (2,0), y-intercepts at (0,32).
- f(x) = (x + 1)(x + 6)(x squared + 32), graph of quartic function, local minimum at (−4, −288), x-intercepts at (-6,0) and (-1,0), y-intercept at (0,192).