2 3 x 4 9 1 2 x 0 July 8, 2019 16 32 64 128 2 3 x 4 9 1 2 3 7 x 0 2 3x 4 9 )( 1 2 x )= 0 (( 1 x 3 )( x 2 4 x 9 2 )( x 8 )) 0 (( 1 x 3 )( x 2 4 x 9 2 )( x 8 )) ≥ 0 3 x 3 = 9 2 4/9 x/9 3 1/9