1 2x 7 2 1 4x 2 July 8, 2019 16 32 64 128 X 2 1 4x 2 1 7x 7 2x Factorise x 2 1 4x 2 1 7x 7 2x 7 8x 2 18 1 2x 2 3x 1 4x 6 1-2x 7
