Question

1. Given f(x) = x² - 1, find f(5).

Answer 1

24

Explanation:

Given f(x) = x² - 1

We want to find f(5)

To do so we input 5 into all x's

f(5) = x² - 1

==> replace x's with 5

f(5) = 5² - 1

==> evaluate exponent

f(5) = 25 - 1

==> simplify subtraction

f(5) = 24