Question

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

f(x) = -3^2 - 4x
A.
–160
B.
–256
C.
–224
D.
160

Answer 1

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