Using the Derivative of F(x) Given Below, Determine the Critical $$f ^ { \prime } ( x ) = ( x + 4 ) ^ { 2 } e ^ { - x }$$

Multiple Choice

Using the derivative of f(x) given below, determine the critical points of f(x) .
- $$f ^ { \prime } ( x ) = ( x + 4 ) ^ { 2 } e ^ { - x }$$

A) -4, -2
B) -2
C) -4
D) 4