How do you solve composition functions?
An example: f(x) = 3x² + 1 g(x) = 2x + 5
f( g(x) ) = 3( g(x) )² + 1
= 3( 2x + 5 )² + 1 = 3(4x² + 20x + 25) + 1 = 12x² + 60x + 75 + 1
= 12x² + 60x + 76
g( f(x) ) = 2( f(x) ) + 5
= 2( 3x² + 1 ) + 5 = 6x² + 2 + 5
= 6x² + 7
