2 9 5 9 4 July 8, 2019 16 32 64 128 3 2 9 5 4 9 2 7 9 5 4 9 2 9 5 9 x 3 4 2 y 5 9 )= 4 9 2 5 9 1 4 9 2 x 9 x 5 9 4 2 3x 5 9 4 9 6 2 9 4 5 9 0 2m 2 9 4m 5 9 9 5 36 x 2 4 9 2 9 x 5 4 )=- 1 9