The function f is defined as f(x) = -4x^3 - 4x^2. What is f(-4)

The function f is defined as f(x) = -4x3 - 4x2. What is f(-4) ?

  1. -320
  2. -192
  3. 16
  4. 192
  5. 320

Answer

The correct answer is D.

Evaluate the function f for x = -4,

f(-4) = -4(-4)3 - 4(-4)2

= -4(-64) - 4(16)

= 256 - 64

= 192