Question

The functions f and g are defined as follows.

f(x)=–2x2-3
g(x) = 2x + 2
=
Find f (6) and g(-5).
Simplify your answers as much as possible.

Answer 1

f(6) = - 75 , g(- 5) = - 8

Explanation:

substitute x = 6 into f(x) , that is

f(6) = - 2(6)² - 3 = - 2(36) - 3 = - 72 - 3 = - 75

substitute x = - 5 into g(x) , that is

g(- 5) = 2(- 5) + 2 = - 10 + 2 = - 8