f ( g ( x )) = − 2 ( x 2 − 2 ) + 7 = − 2 x 2 + 4 + 7 = − 2 x 2 + 11
The general rule for the composition of the functions f ( g ( x )) is − 2 x 2 + 11 . This was obtained by substituting g ( x ) into f ( x ) and simplifying. Therefore, f ( g ( x )) = − 2 x 2 + 11 .
;