Diketahui f(x)=√x-4 dan (g•f) (x) =x-9 rumus fungsi g(x) adalah.tolong jawab ya kak

(gof)(x) = x-9
g(f(x))= x-9
g(√(x-4)) = x-9
misal:
√(x-4) =a
x-4 = a²
x = a² +4

g(a) = a² + 4 -9
g(a) = a² -5

jadi g(x) = x²-5