koordinat titik balik grafik fungsi kuadrat y=xpangkat2+4x-6

Koordinat titik balik = (x,y)

y = x² + 4x - 6
x = -b/2a = -4/2 = -2
y = -D/4a = (4ac - b²)/4a = (4(-6) - 4²)/4
y = -40/4 = -10

titik balik = (-2,-10)