Question

The functions fand g are defined as follows.

f(x)=2x²-3x g(x)=-4x-1
Find f(-4) and g (5).

f(-4) = ?
g (5) = ?

Answer 1

f(- 4) = 44 , g(5) = - 21

Explanation:

to evaluate f(- 4) substitute x = - 4 into f(x)

f(- 4) = 2(- 4)² - 3(- 4) = 2(16) + 12 = 32 + 12 = 44

to evaluate g(5) substitute x = 5 into g(x)

g(5) = - 4(5) - 1 = - 20 - 1 = - 21