Section: Math Section 2

39) If x = 4, then (x² - 2)(4 + x) =

1. 16
2. 64
3. 86
4. 98
5. 112

This is a straightforward substitution problem, but be sure to remember the order of operations. First plug in 4 for x to get (16 - 2)(4 + 4). Simplify the expressions within the parentheses to get (16 - 2)(4 + 4), which is 14 x 8, or 112.