X 4 7x 2 1 0 July 8, 2019 16 32 64 128 X 4 7x 3 14x 2 7x 1 0 X 4 6x 3 7x 2 6x 1 0 6 x 2 )( x 4 )( 1 7x )= 0 7 x4 7 x − 4 ( 2 x − 1 ) ≤ − 7
