Find a centre and the principal axes of the following conicoid. Is it ellip-
soids, hyperboloids or something else?
3x2 + 5y2 + 3z2 + 2yz + 2zx + 2xy - 4x - 8z + 5 = 0
Let y^2=4ax be a parabola and P be a point on it. Let the normal at P intersect the X-axis at Q. Draw a line at Q perpendicular to the above normal. Show that this line intersects the parabola y^2+4a(x-2a)=0