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

Multiple Choice

Using the derivative of f(x) given below, determine the intervals on which f(x) is increasing or decreasing.
- $$f ^ { \prime } ( x ) = ( x + 2 ) ^ { 2 } e ^ { - x }$$

A) Decreasing on $( - \infty , - 2 )$ ; increasing on $( - 2 , \infty )$
B) Never decreasing; increasing on $( - \infty , - 2 ) \cup ( - 2 , \infty )$
C) Never decreasing; increasing on $( - \infty , 2 ) \cup ( 2 , \infty )$
D) Never increasing; decreasing on $( - \infty , - 2 ) \cup ( - 2 , \infty )$