Xy 2x 3y 2 0 July 8, 2019 16 32 64 128 Xy 2 0 2x 3y 1 0 Xy 2x 3y '+( x 2 2 y 0 X 2 xy 2x 3y 4 0 Xy dx 2x 2 3y 2 20 dy 0 Is x y 1 2x 3y 2 xy 0 2x 2 xy 3y 2 10y 8 0