The question is the curve has equation xy = 3x^2 - y^2 + 3
Find in surd form the x coordinates of the point P and Q on the cruve at which Dy/Dx = 0
I used implicit differentation and got it to DY/DX = 6x - y/ x + 2y
Yet when i make it equal to 0 i get x and y as 0 which is wrong? any ideas