Question

Evaluate the function.

f(x)= - x^2 - 10x

find f(-5)

Answer 1

f(- 5) = 25

Explanation:

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

f(- 5) = - (- 5)² - 10(- 5) = - 25 + 50 = 25