5 7x 5 2 (- 4x 3 )- 6 July 8, 2019 16 32 64 128 3x 5 2 4x 5 3 7x 1 6 5 ≥ 7x 5 2 − 4x 3 − 6 5 x 2 4x 3 5 x 2 7x 6 5 x 7 = 35
