For the Pair of Functions, Perform the Indicated Operation $f ( x ) = x ^ { 3 } + 3 x ^ { 2 } , g ( x ) = \sqrt { x - 8 }$

Multiple Choice

For the pair of functions, perform the indicated operation.
- $f ( x ) = x ^ { 3 } + 3 x ^ { 2 } , g ( x ) = \sqrt { x - 8 }$ Find (f+g) (x) .

A) $x ^ { 3 } + \sqrt { 3 x ^ { 2 } + x - 8 }$
B) $\sqrt { x ^ { 3 } + 3 x ^ { 2 } + x - 8 }$
C) $x ^ { 3 } + 3 x ^ { 2 } + \sqrt { x - 8 }$
D) $x ^ { 3 } + 3 x ^ { 2 } + x - 8$