7 8 x 2 5 1 5 x 2 3 July 8, 2019 16 32 64 128 Tính 7 8 x 2 5 1 5 x 2 3 1 2 3 5 x 8 7 4 2 5 x 4 7/(5 - x) = 8/(2 + x) 7 8 × 2 5 = (7 8−5 3)⋅1 2
