tentukan g°f°f(x) jika f(x)=2x-1 dan g(x)=x2-3x+2

(g°f°f) (x) = (g°f) {f(x)}
= (g°f) (2x - 1)
= g {f(2x - 1)
= g (4x-3)
= (4x - 3)² - 3(4x-3) + 2
= 16x² - 24x - 12x + 9 + 2
= 16x² -36x + 11