diketahui g(x)=x² dan (gof)(x)=x²-6x+9 tentukan (g-¹of-1)(x)

x^2-6x+9=f(x)^2
f(x)=x-3

g(x)=x^2
y=x^2
y^1/2=x
g-1(x)=x^1/2

f(x)=x-3
y=x-3
x=y+3
f-1(x)=x+3

(g-1of-1)(x)=(x+3)^1/2