Question

Evaluate the following function f(x) = x²-20 for f(5)

Answer 1

5

Explanation:

Subitute:

f(5) = 5^2-20

Solve:

f(5) = 5

Answer 2

f(5) = 5

Explanation:

To evaluate f(5) , substitute x = 5 into f(x), that is

f(5) = 5² - 20 = 25 - 20 = 5