The common chord of x 2 y 2 4x 4y 0 July 8, 2019 16 32 64 128 The common chord of the circle 2 2 x y 4x 1 0 and 2 2 x y 6x 2y 3 0 is The common chord of x^2+y^2-4x-4y=0 and x^2+y^2=16
