Tentukan (3,0) (1,0) dititik (-1,-4)

Kelas 10 Matematika
Bab Fungsi Kuadrat

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

y = (-1/2) . (x - x1) . (x - x2)
y = (-1/2) . (x - 3) . (x - 1)
y = (-1/2) . (x² - 4x + 1)
y = (-1/2) . x² + 2x - 1/2