75 ( x 18 )= 5 2 July 8, 2019 16 32 64 128 75 chia x 18 5 mũ 2 3 75 x 0 5 18 25 3 75 x nhân 0 5 18 25 75 x 18 5 mũ 2 75 - x = 5 75 + 18 =
