Basic Algebra
Example 1
Evaluate the expression when x = 2, y = 3, and z = 1. 
Example 2
Find the values of the expression for x = 2, 1, 0, 1, 2 This question is asking us to evaluate the expression for five different values. It may be easiest to do this in chart form.

Example 3
Which of these values (2, 1, 0, 1, 2) makes this equation true? Just like the previous problem, it is probably useful to make a chart. 