5x 5y 4 2 July 8, 2019 16 32 64 128 5x 5y 10x 2y 4 1 5x 4 5y 2 5x 2y x 5y 4 5x 2y =- 3x 5y 4 5x 2y 78x 5y 4 5x 2 10xy 5y 4 5x 2y 4 6x 5y =- 10 25x 5y 4 5x 8y 2 5x 3y 20 3x 5y =- 4 5x 2y 3 )( 4x 5y 4 5x 6y 4 2x 5y =- 1