Diketahui (gof) (x) =4xkuadrat+4x dan g (x) =xkuadrat-1.tentukanlah nilai f (x-2)

(gof) (x) = 4x² + 4x
g(x) = x² – 1

(gof) (x) = 4x² + 4x
g(f(x)) = 4x² + 4x
(f(x))² – 1 = 4x² + 4x
(f(x))² = 4x² + 4x + 1
f(x) = 2x + 1

f(x – 2) = 2(x – 2) + 1
= 2x – 4 + 1
= 2x – 3