?????????????? vertex ?????????????
aent no vertex...kerv is smooth...no pinty thangs...
its a parabola that kerv up
yu kan find the bottom bi get tangent & find weer tangent=0
y=(x-2)^2 -2
1 point is (0,-2), so kerv go belo x-axis
for big & negativ x, kerv go abuv x-azis, so it gotta kros x-axis at 2 point
dy/dx=2*(x-2)...this =0 at x=2, so that is the bottom av the parabola...(2,-2)