Can you homogenise a parabola as 1 = y^2/4ax and put it in a circle as
x^2 + y^2 =a^2 x 1^2 ?
x2 + y2 =a2 . 12 = a2 . (y2/4ax)2 is 4th degree eqn. It cannot represent pair of lines.
x2 + y2 =a2 . 12 = a2 . (y2/4ax)2 is 4th degree eqn. It cannot represent pair of lines.