Tolong Bantuin, Kelas 10 Matematika beserta cara jawabnya

Kelas 10 Matematika
Bab Fungsi Komposisi

f(x) = 4
x² - 2x + 4 = 4
x² - 2x + 4 - 4 = 0
x (x - 2) = 0
x = 0 

x - 2 = 0
x = 2

1/(3x² - 6x + 8)
= 1/(3 . 0² - 6 . 0 + 8)
= 1/8

atau

1/(3 . 2² - 6 . 2 + 8)
= 1/(3 . 4 - 12 + 8)
= 1/8