Let $f ( x ) = 3 x + 1$ And $g ( x ) = 3 x ^ { 2 } - 2 x + 1$

Essay

Let $f ( x ) = 3 x + 1$ and $g ( x ) = 3 x ^ { 2 } - 2 x + 1$ . Find $f - g$ , $\mathrm { fg }$ , and their domains.