Koodinat titik balik fungsi y=2x-4x+8

Bab Fungsi Kuadrat
Matematika SMP Kelas VIII

y = 2x² - 4x + 8
a = 2; b = -4; c = 8.

sumbu simetri = x = -b/2a
sumbu simetri = x = - (-4) / (2 . 2)
sumbu simetri = x = 4/4
sumbu simetri = x = 1

y = 2 . 1² - 4 . 1 + 8
y = 6

koordinat = (1, 6)