tugas mtk sy. bantu dong..

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

(g•f)(x) = g(fx)
(g•f)(x) = x^2 + 2x - 3
(g•f)(x) = (x-1)^2 +2(x-1)-3
(g•f)(x) = x^2 - 2x + 1 + 2x - 2 - 3
(g•f)(x) = x^2 - 4 (A)

semoga membantu yaa:)