Koordinat titik balik grafik fungsi y=x2-6x-7

jawab

fungsi kuadrat
y = x² -6x - 7
a= 1
b = -6
c= -7
titk balik (x,y) --> x =  -b./2a = - (-6)/(2.1) = 3
y = 3²-6.3 -7 --> y = 9 -18 - 7 = -16
tik balik (x,y)= (3,-16)