Find ( F ? G )(X) $f ( x ) = \frac { 2 x } { 6 x + 9 }$

Multiple Choice

Find ( f ? g ) (x) . $f ( x ) = \frac { 2 x } { 6 x + 9 }$ $g ( x ) = - \frac { 9 } { x }$

A) $( f - g ) ( x ) = \frac { 2 x + 9 } { 5 x + 9 }$
B) $( f - g ) ( x ) = \frac { 2 x + 63 } { 6 x + 9 }$
C) $( f - g ) ( x ) = \frac { 2 x + 45 } { 6 x + 9 }$
D) $( f - g ) ( x ) = \frac { 2 x ^ { 2 } + 54 x - 81 } { 6 x ^ { 2 } + 9 x }$
E) $( f - g ) ( x ) = \frac { 2 x ^ { 2 } + 54 x + 81 } { 6 x ^ { 2 } + 9 x }$