tolongin dongg, mau dikumpulin

(g0f)x = g(f(x))
           = g(x-1)
            = [tex] (x-1)^{2} [/tex] + 2(x-1) - 3
            = [tex] x^{2} [/tex] - 2x +1 + 2x-2-3
            = [tex] x^{2} [/tex] - 4