5x2 9 4 0 July 8, 2019 16 32 64 128 5 4 x 2 7x 9 0 4 0 5 x 9 )=- 2 1 2 3 0 9 x 4 5 9 65 x 0 4 x 2 5 2 5 x 9 67 x 0 4 5 x2 5 x 5 x 5