Find (Fg)(x) $f ( x ) = x ^ { 2 } , g ( x ) = 7 x - 7$

Multiple Choice

Find (fg) (x) . $f ( x ) = x ^ { 2 } , g ( x ) = 7 x - 7$

A) $7 x ^ { 3 } + 7 x ^ { 2 }$
B) $7 x ^ { 3 } - 7 x ^ { 2 }$
C) $7 x ^ { 2 } - 7 x ^ { 3 }$
D) $7 x ^ { 2 } + 7 x ^ { 3 }$
E) $7 x - 7 x ^ { 2 }$