jika (f0g) = 4x²-12x + 5 dan g(x) = 2x-3 maka tentukan f)(x)..

(fog)(x) = 4x²-12x+5
f(g(x) = (fog)(x)
f(x) → g(x) = y

2x-3 = y
x = ½(y+3)

f(x) = 4(½[y+3])² -12(½[y+3]) +5
f(x) = y²+6y+9 -6y-18 +5
f(x) = y² - 4

f(x) = x² - 4