假設a、b、c均為整數1234 copyright protection220ＰＥＮＡＮＡmyXnlUUIMs 尼

a^3+b^3-c^3=01234 copyright protection220ＰＥＮＡＮＡv1wBvMZlQD 尼

(a+b)^3-c^3-3ab(a+b)=0224Please respect copyright.ＰＥＮＡＮＡE81LR2ovDv
1234 copyright protection220ＰＥＮＡＮＡ4PMCQs3quO 尼

(a+b-c)^3+3c(a+b-c)(a+b)=3ab(a+b)1234 copyright protection220ＰＥＮＡＮＡCCbceVhe4f 尼

(a+b-c)^3=3(a+b)(a-c)(b-c)224Please respect copyright.ＰＥＮＡＮＡsZpaXTMbws
1234 copyright protection220ＰＥＮＡＮＡUjupIhsHSR 尼

可得a+b-c必為3的倍數1234 copyright protection220ＰＥＮＡＮＡUiZNP5aQGc 尼

假設a+b-c=3m1234 copyright protection220ＰＥＮＡＮＡQt62yuXIYW 尼

9m^3=aab-aac+abb-bbc+acc+bcc-2abc=aa(3m-a)+bb(3m-b)+cc(3m+c)-2abc1234 copyright protection220ＰＥＮＡＮＡjfLd2tTXvp 尼

3m^2=aa+bb+cc-(aaa+bbb-ccc+2abc)/3m=aa+bb+cc+2ab-2ac-2bc224Please respect copyright.ＰＥＮＡＮＡMDjXZbS9p2
1234 copyright protection220ＰＥＮＡＮＡOlSq5ETz0V 尼

2ab-2ac-2bc=-2abc/3m224Please respect copyright.ＰＥＮＡＮＡwPn0v5lz4h
1234 copyright protection220ＰＥＮＡＮＡhYZuG2heSA 尼

ab-ac-bc=abc/(a+b-c)1234 copyright protection220ＰＥＮＡＮＡQ0rODM9V6y 尼

abc=(a+b-c)(ab-ac-bc)1234 copyright protection220ＰＥＮＡＮＡHMfOCl3mUd 尼

4abc=aab-aac+abb-bbc+acc+bcc=ab(a+b)-c((a+b)^2-2ab)+cc(a+b)1234 copyright protection220ＰＥＮＡＮＡ0oo4Ev34zi 尼

4abc=ab(a+b)-c(a+b)^2+2abc+cc(a+b)1234 copyright protection220ＰＥＮＡＮＡqJ3Ws5YmXE 尼

2abc=(a+b)(ab-ac-bc+cc)1234 copyright protection220ＰＥＮＡＮＡEJzEz67qir 尼

2abc=(a+b)(a-c)(b-c)1234 copyright protection220ＰＥＮＡＮＡNVlog9Uv4h 尼

故6abc=(a+b-c)^3224Please respect copyright.ＰＥＮＡＮＡmJ0Tn6WSKD
1234 copyright protection220ＰＥＮＡＮＡtrMIvFlU1n 尼

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