假設a、b、c均為整數1234 copyright protection225ＰＥＮＡＮＡ91P5hye6Af 尼

a^3+b^3-c^3=01234 copyright protection225ＰＥＮＡＮＡ8H6n4WB1Dv 尼

(a+b)^3-c^3-3ab(a+b)=0229Please respect copyright.ＰＥＮＡＮＡx6dngzbUXz
1234 copyright protection225ＰＥＮＡＮＡANp1KDKfjm 尼

(a+b-c)^3+3c(a+b-c)(a+b)=3ab(a+b)1234 copyright protection225ＰＥＮＡＮＡDU9BAxfi49 尼

(a+b-c)^3=3(a+b)(a-c)(b-c)229Please respect copyright.ＰＥＮＡＮＡ1H41kHTCA9
1234 copyright protection225ＰＥＮＡＮＡ38YuiucJHu 尼

可得a+b-c必為3的倍數1234 copyright protection225ＰＥＮＡＮＡhJQpB2GN5V 尼

假設a+b-c=3m1234 copyright protection225ＰＥＮＡＮＡvKgVKmwANg 尼

9m^3=aab-aac+abb-bbc+acc+bcc-2abc=aa(3m-a)+bb(3m-b)+cc(3m+c)-2abc1234 copyright protection225ＰＥＮＡＮＡII8hKWamUs 尼

3m^2=aa+bb+cc-(aaa+bbb-ccc+2abc)/3m=aa+bb+cc+2ab-2ac-2bc229Please respect copyright.ＰＥＮＡＮＡti4Vbp31f8
1234 copyright protection225ＰＥＮＡＮＡ8aXP4MLUlO 尼

2ab-2ac-2bc=-2abc/3m229Please respect copyright.ＰＥＮＡＮＡsdikaQN5Jk
1234 copyright protection225ＰＥＮＡＮＡJpsH36ivwG 尼

ab-ac-bc=abc/(a+b-c)1234 copyright protection225ＰＥＮＡＮＡ9GnQOeKXZZ 尼

abc=(a+b-c)(ab-ac-bc)1234 copyright protection225ＰＥＮＡＮＡ4VyIazdkAd 尼

4abc=aab-aac+abb-bbc+acc+bcc=ab(a+b)-c((a+b)^2-2ab)+cc(a+b)1234 copyright protection225ＰＥＮＡＮＡ9ryNtQvPK5 尼

4abc=ab(a+b)-c(a+b)^2+2abc+cc(a+b)1234 copyright protection225ＰＥＮＡＮＡSi4kBcYfTC 尼

2abc=(a+b)(ab-ac-bc+cc)1234 copyright protection225ＰＥＮＡＮＡtOfTpq4hIp 尼

2abc=(a+b)(a-c)(b-c)1234 copyright protection225ＰＥＮＡＮＡOjR3HgrCtV 尼

故6abc=(a+b-c)^3229Please respect copyright.ＰＥＮＡＮＡtFwfUKVEYf
1234 copyright protection225ＰＥＮＡＮＡD8vpSXbvIi 尼

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