Jika f(x) = x + 2 dan g(x) = 3x kuadrat + 4x + 1 maka carilah (gof)((x)......

(gof)(x) = (g(f(x))
            = (g (x+2))
            = 3 (x+2)^2 + 4(x+2) + 1
            = 3(x^2 + 4x + 4) + 4x + 8 + 1
            = 3x^2 + 12x + 12 + 4x + 9
            = 3x^2 + 16x + 21

(gof)(×) = 3(x+2)^2 + 4(x+2)+1
= 3(x^2 +4x+4) + 4x + 8 + 1
= 3x^2 + 12x + 12 + 4x + 9
= 3x ^2 + 16x + 21