Perform the Requested Operation or Operations $$f ( x ) = 2 x + 7 , g ( x ) = 6 x ^ { 2 }$$

Perform the requested operation or operations. Find the domain of each.
- $$f ( x ) = 2 x + 7 , g ( x ) = 6 x ^ { 2 }$$
Find $( \mathrm { fg } ) ( \mathrm { x } )$ .

A) $12 x ^ { 3 } + 42 x ^ { 2 }$ ; domain: $( - \infty , \infty )$
B) $12 x + 42$ ; domain: $( - \infty , \infty )$
C) $6 x ^ { 2 } + 2 x + 7$ ; domain: $( - \infty , \infty )$
D) $12 x ^ { 2 } + 42 x$ ; domain: $( - \infty , \infty )$

Correct Answer:

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