Koordinat ttk balik minimum fungsi kuadrat f(x)=x*2+2x-8

Kelas 10 Matematika
Bab Persamaan dan Fungsi Kuadrat

f(x) = x² + 2x - 8
a = 1; b = 2. c = 8

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

f(-1) = (-1)² + 2 . (-1) - 8
f(-1) = 1 - 2 - 8
f(-1) = -9

(-1,-9)