7 x 4 ) 9x 2 July 8, 2019 16 32 64 128 7 x 4 )+ 9x 2 7x 4 9x 2 7 9x 4 2 x 9 7x 1 9x 2 2x 7 )( x 4 7x 4 9x 24 2x 7x 4 9x 24 7 x − 4 9x 16x − 28 9x 4 x 7 27 2 4 x ) 9x 7 6x 1 2 (- 8x 7 )=- x 4 3 (- 9x 3 7x4 9 9/7 x 4 4 x 9 x 7
