(a) There are no restrictions on the values that x can take in this example, since it is a general question with no practical significance.

(b) Draw up a table of values:

x -1 0 1 2 3
y -2 0 0 4 18

Since `y = 0` when `x = 0` and `x = 1`, we examine what happens between those 2 x-values:

When `x = 1/2, y = -1/8.`

Here is our graph:

12-11234-1-2xyOpen image in a new page

Graph of y = x3 x2, a cubic.