Perform the Requested Operation or Operations $$f ( x ) = 4 x + 8 , g ( x ) = 4 x ^ { 2 }$$

Multiple Choice

Perform the requested operation or operations. Find the domain of each.
- $$f ( x ) = 4 x + 8 , g ( x ) = 4 x ^ { 2 }$$
Find $( f + g ) ( x )$ .

A) $4 x + 8 + 4 x ^ { 2 }$ ; domain: $( - \infty , \infty )$
B) $4 x + 8 - 4 x ^ { 2 }$ ; domain: $( - \infty , \infty )$
C) $\frac { 4 x + 8 } { 4 x ^ { 2 } } ;$ domain: $( - \infty , \infty )$
D) $16 x ^ { 3 } + 32 x$ ; domain: $( - \infty , \infty )$