Question

Prsamaan grafik fungsi kuadrat dngan titik puncak ( 2 8) dan melalui titik (4, 0)

Answer 1

Verified answer

Kelas 10 Matematika
Bab Fungsi Kuadrat

(2, 8) dan (4, 0)

y - yp = a . (x - xp)²
0 - 8 = a . (4 - 2)²
-8 = a . 4
a = -8/4
a = -2

y = a . (x - xp)² + yp
y = (-2) . (x - 2)² + 8
y = (-2) . (x² - 4x + 4) + 8
y = -2x² + 8x - 8 + 8
y = -2x² + 8x