Evaluate the function for x = - 4c if c = - 2.

f (x) = - 3^2 - 4x

A.

-160

B.

-256

C.

-224

D.

160

x = - 4c

if c = - 2 then x = - 4 (-2) = 8

I believed you had a typo, function should be f (x) = - 3x^2 - 4x

so

f (x) = - 3x^2 - 4x

f (x) = - 3 (8^2) - 4 (8)

f (x) = - 3 (64) - 32

f (x) = - 192 - 32

f (x) = - 224

answer

C.

-224