f(x) = 2x -1 dan g(x) = x² + 3x +1 maka (gof) (x) =...

(gof)(x)
= g(f(x))
= (f(x))^2 + 3(f(x)) + 1
= (2x - 1)^2 + 3(2x - 1) + 1
= (4x^2 - 4x + 1) + (6x - 3) + 1
= 4x^2 + 2x - 1