Question

use the following function rule to find f(-7).

f(x) = x² - 4x

f(-7) =

save answer

Explanation:

Step1: Substitute $x=-7$ into $f(x)$

$f(-7) = (-7)^2 - 4(-7)$

Step2: Calculate squared term and product

$f(-7) = 49 + 28$

Step3: Sum the two values

$f(-7) = 77$

Answer:

77