5 2x 1 9x July 8, 2019 16 32 64 128 5 2x 1 )= 9x 2 0 9x 5 1 2x 3 4 3 2x 5 1 9x 5 left 2x 1 right )= 9x 2 2x2 9x 5 2x 1 6x 5 2x 1 9x 3x 1 0 7x 4 =- 2x 1 9x 5 9x 2x 1 5 x 7 4x 3 9x 5 2x 1 1 9x 5 2x 3 ≤ 19 9x 5 2x 1 )=- 3 x 4
