2 x 0 5 ) 1 9 July 8, 2019 16 32 64 128 2 x 0 5 )+ 1 9 1 x 2 0 9 5 4 2 x 1 - 0 5 √ 1 9 2 x 2 5 2 5 x 0 9 5 x 0 2 5×0 9
