Question

Persamaan grafik fungsi kuadrat yang memotong sumbu x di titik dalam kurung 1,0 dan dalam kurung 3,0 serta melalui titik (-1,-6)adalah

Answer 1

Verified answer

Kelas 10 Matematika
Bab Fungsi Kuadrat

(1, 0), (3, 0), (-1, -6)

y = a (x - x1) (x - x2)
-6 = a . (-1 - 1) . (-1 - 3)
-6 = a . (-2) . (-4)
a = -6/8
a = -3/4

y = a . (x - x1) . (x - x2)
y = -3/4 . (x - 1) . (x - 3)
y = -3/4 . (x² - 4x + 3)
y = (-3/4) x² + 3x - (9/4)