5x 2 x 4 )=- 2 5x 6 July 8, 2019 16 32 64 128 X 2 5x 4 )( x 2 5x 6 )= 120 X 2 5x 6 )( x 2 5x 4 )= 840 X 2 )- 4 )/( x 2 )- 5x 6 ≤ 0 4x 2 5x 6 )( 2x 4 5x 2 6 5x 4 3x 2 ) x 2 x 5x 6 )= 0