假設a、b、c均為整數1234 copyright protection234ＰＥＮＡＮＡyOrUdKzUo6 尼

a^3+b^3-c^3=01234 copyright protection234ＰＥＮＡＮＡNb4GVKnWLe 尼

(a+b)^3-c^3-3ab(a+b)=0238Please respect copyright.ＰＥＮＡＮＡ4QX6nvAMfs
1234 copyright protection234ＰＥＮＡＮＡiHLq8XkGkx 尼

(a+b-c)^3+3c(a+b-c)(a+b)=3ab(a+b)1234 copyright protection234ＰＥＮＡＮＡ9FD0CEcUMW 尼

(a+b-c)^3=3(a+b)(a-c)(b-c)238Please respect copyright.ＰＥＮＡＮＡ9D1MhAivkb
1234 copyright protection234ＰＥＮＡＮＡSaNSyjXuJm 尼

可得a+b-c必為3的倍數1234 copyright protection234ＰＥＮＡＮＡUZQwWaLTGI 尼

假設a+b-c=3m1234 copyright protection234ＰＥＮＡＮＡ8UegAUkQ4n 尼

9m^3=aab-aac+abb-bbc+acc+bcc-2abc=aa(3m-a)+bb(3m-b)+cc(3m+c)-2abc1234 copyright protection234ＰＥＮＡＮＡ6zIeRM5Utz 尼

3m^2=aa+bb+cc-(aaa+bbb-ccc+2abc)/3m=aa+bb+cc+2ab-2ac-2bc238Please respect copyright.ＰＥＮＡＮＡk1pwcKRanI
1234 copyright protection234ＰＥＮＡＮＡNS8DVS9gfy 尼

2ab-2ac-2bc=-2abc/3m238Please respect copyright.ＰＥＮＡＮＡBLFZKJA3vq
1234 copyright protection234ＰＥＮＡＮＡ9LwXjxbm1m 尼

ab-ac-bc=abc/(a+b-c)1234 copyright protection234ＰＥＮＡＮＡmnyZxzUGQV 尼

abc=(a+b-c)(ab-ac-bc)1234 copyright protection234ＰＥＮＡＮＡcwk6k414mX 尼

4abc=aab-aac+abb-bbc+acc+bcc=ab(a+b)-c((a+b)^2-2ab)+cc(a+b)1234 copyright protection234ＰＥＮＡＮＡS4dhvUkqAW 尼

4abc=ab(a+b)-c(a+b)^2+2abc+cc(a+b)1234 copyright protection234ＰＥＮＡＮＡF7iMHUw73j 尼

2abc=(a+b)(ab-ac-bc+cc)1234 copyright protection234ＰＥＮＡＮＡwiXWAwJiG9 尼

2abc=(a+b)(a-c)(b-c)1234 copyright protection234ＰＥＮＡＮＡ05dZu2TTO7 尼

故6abc=(a+b-c)^3238Please respect copyright.ＰＥＮＡＮＡQfExtk4SX3
1234 copyright protection234ＰＥＮＡＮＡDui7xMFUGh 尼

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