Report - 64x ＋27y a b a b問題1 問題2 問題3 問題4 問題5 問題6 問題7 問題9 問題8 問題10 64x3＋27y3 （a ＋2b＋1）（a－2b＋1） 3 23 560 A∪B＝｛6，8｝ 22 1 x

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