Jika f(x) = x + 3 dan g (x) = x² - 2x + 5. Komposisi ( g o f ) (x) adalah...

f(x) = x +3
g(x)= x² - 2x +5
(g o f) = g(f(x))
= x² - 2x +5
= (x+3)² - 2(x+3) + 5
= (x + 3) (x + 3) - 2 ( x + 3) +5
= x² +3x +3x +9 - 2x -6 + 5
=x² + 6x -2x + 9 -6+5
= x² +4x+8