Jka g(x) = x + 5 dan ( f • g)(x) = x[kuadrat] - 6, maka f(x - 1) = .......

[tex]g(x)=x+5 \\ (f\circ g)(x)=x^2-6 \\ f(x+5)=x^2-6 \\ f(x+5-6)=(x-6)^2-6 \\ f(x-1)=x^2-12x+36-6 \\ f(x-1) = x^2-12x+30[/tex]