mohon bantuan nya ya, makasih!

f(x) = x² - 4
g(x) = x + 2

(g • f)(x) = (x² - 4) + 2
(g • f)(x) = x² - 4 + 2
(g • f)(x) = x² - 2
(g • f)(0) = 0² - 2
(g • f)(0) = -2

semoga membantu. mohon dikoreksi bila ada kesalahan