X 2 4x y 2 6y 4 0 July 8, 2019 16 32 64 128 X 4 4x 2 y 2 6y 9 0 X 2 y 2 4x 6y 4 0 in standard form The normal at 11 to the circle x 2 y 2 4x 6y 4 0 is 6xy - 4y + 6 - 9x
