bantu dong sama caranya ,,, makasih

2. a) fog (x) = f (g(x))
= 2(x+2)^2 + 1
=2(x^2 + 4x + 4) + 1
=2x^2 + 8x + 9

b). gof (x) = 2x^2 +1 +2
=2x^2 + 3
gof(3) = 2.9+3 = 21