jawabannya yang mana?

f(x) = 2x - 3
g(x) = x^2 + 2x -3
(fog) x = 2 (x^2 + 2x -3) -3
           = 2x^2 + 4x -6 -3
           = 2x^2 + 4x - 9

(fog) (2) = 2 (2)^2 + 4(2) - 9
= 8 + 8 - 9
= 16 - 9
= 7

semoga membantu