找规律51X59,72X78,84X86,113X117,68X62,187X183
找规律51X59,72X78,84X86,113X117,68X62,187X183
日期：2021-07-17 03:07:31 人气：1
51X59 = (55-4)X(55+4) = 55²-4² = 3025-16 = 3009
72X78 = (75-3)×(75+3) = 75²-3² = 5625-9 = 5016
84X86 = (85-1)×(85+1) = 85²-1² = 7225-1 = 7224
113X117 = (115-1)×(115+1) = 115²-1² = 13225-1 = 13224
72X78 = (75-3)×(75+3) = 75²-3² = 5625-9 = 5016
84X86 = (85-1)×(85+1) = 85²-1² = 7225-1 = 7224
113X117 = (115-1)×(115+1) = 115²-1² = 13225-1 = 13224