1. Diket fungsi f(x)= x²+3x-4 dan (f+g)(x)= x²+x+2. Nilai g(x)=...... 2. Diket fungsi f(x)=x-2 dan g(x)= x²+3x-4. Hasil dari (gof)(-1)=.......

1) (f + g) (x) = f(x) + g(x)
g(x) = (f + g) (x) - f(x)
g(x) = x² + x + 2 - (x² + 3x - 4)
g(x) = x² - x² + x - 3x + 2 + 4
g(x) = -2x + 6

2) (g o f) (x) = g (f(x))
(g o f) (x) = (x - 2)² + 3(x - 2) - 4
(g o f) (x) = x² - 4x + 4 + 3x - 6 - 4
(g o f) (x) = x² - x - 6

(g o f) (-1) = (-1)² - (-1) - 6
(g o f) (-1) = 1 + 1 - 6
(g o f) (-1) = -4