f(x) = 4 x + 2 g(x) = 2 x ² - 1 tentukan f • g (x) = ..... dan g • f (2)= .....

fog (x)
f(g(x)) = 4(2x^2-1) +2
= 8x^2 -4 + 2
= 8x^2 - 2

gof (x) =2 (4x+2)^2 - 1
= 2 (16x^2+ 16x + 4) - 1
= 32x^2 + 32x + 7