0 9x 5 4 July 8, 2019 16 32 64 128 0 9x 5 4 x 4x2 9x 5 0 4x 9x 5 0 0 9x 5 1 2x 3 4 9x 4y 5 0 6xy 9x 4y 5 0 0 9 x 5 0 9 x =5 4 0 9 x 4 0 4 x 5/9
