F(x) = 3x2 - 4x + 6 dan g(x) = 2x - 1 jika nilai f o g (x) = 101

(fog)(x) = 101
3(2x - 1)² - 4(2x - 1) + 6 = 101
12x² - 12x + 3 - 8x + 4 + 6 - 101 = 0
12x² - 20x - 88 = 0
3x² - 5x - 22 = 0
(3x - 11)(x + 2) = 0
x = 11/3 atau x = -2

NiLai x yg memenuhi :
-2 dan 11/3