Dik : f(x) =4x-3 dan g(x)=2x²-3x+5 Dit : g°f(x)

Diketahui :
f (x) = 4x - 3
g (x) = 2x² - 3x + 5

Ditanya : gof (x) ?

Dijawab :
gof (x)
= g (f (x))
= g (4x - 3)
= 2 (4x - 3)² - 3 (4x - 3) + 5
= 2 (16x² - 24x + 9) - 12x + 9 + 5
= 36x² - 48x + 18 - 12x + 14
= 36x² -48x - 12x + 18 + 14
= 36x² - 60x + 32

Jadi, gof (x) = 36x² - 60x + 32

jadi, (gof) (x)= 32x²-60x+32