tolong dong no 4 dan 5 beserta caranya yaaa

NOMOR 4
f(x) = 6x² - 4x + 3
g(x) = 2x² - 2x - 5

Maka,
(f + g) (x) = f(x) + g(x)
(f + g) (x) = (6x² - 4x + 3)+(2x² - 2x - 5)
(f + g) (x) = 8x² - 6x - 2

Jawaban D

NOMOR 5
f(x) = 2x + 1
g(x) = 5x - 4

Maka :
g o f (x) = g(f(x)) = g(2x + 1)
g o f (x) = 5(2x + 1) - 4
g o f (x) = 10x + 5 - 4
g o f (x) = 10x + 1

Jawaban D.