diketahui (g ° f)(x) = 4x²+4x dan g(x) = x²-1. tentukanlah nilai f(x-2)

gof(x) = 4x^2+4x
g(f(x)) = 4 x^2 + 4x
(f(x))^2 - 1 = 4x^2 + 4x
(f(x))^2 = 4x^2 + 4x + 1
(f(x))^2 = (2x + 1)^2
f(x) = 2x + 1
f(x-2) = 2(x-2) + 1
 = 2x - 4 +1
 =2x -3