1 2 x 5 2 7 2 x 3 4 July 8, 2019 16 32 64 128 1 x 1 2 2 x 5 2 3 x 7 2 4 x 9 2 2 ⋅ ( 7 x − 1 2 ) = ( 5 + 4 3 x ) ⋅ 4