假設a、b、c均為整數1234 copyright protection233ＰＥＮＡＮＡi2qkmYqCdM 尼

a^3+b^3-c^3=01234 copyright protection233ＰＥＮＡＮＡXPInB36pI4 尼

(a+b)^3-c^3-3ab(a+b)=0237Please respect copyright.ＰＥＮＡＮＡqvh0qoG8ht
1234 copyright protection233ＰＥＮＡＮＡp65IWyA4MA 尼

(a+b-c)^3+3c(a+b-c)(a+b)=3ab(a+b)1234 copyright protection233ＰＥＮＡＮＡ035r4GtLbR 尼

(a+b-c)^3=3(a+b)(a-c)(b-c)237Please respect copyright.ＰＥＮＡＮＡkAN0zKby5k
1234 copyright protection233ＰＥＮＡＮＡ0dsu5pFUCk 尼

可得a+b-c必為3的倍數1234 copyright protection233ＰＥＮＡＮＡF6pYeCfWVq 尼

假設a+b-c=3m1234 copyright protection233ＰＥＮＡＮＡ8loKbuxA4D 尼

9m^3=aab-aac+abb-bbc+acc+bcc-2abc=aa(3m-a)+bb(3m-b)+cc(3m+c)-2abc1234 copyright protection233ＰＥＮＡＮＡ5gJXUU01tn 尼

3m^2=aa+bb+cc-(aaa+bbb-ccc+2abc)/3m=aa+bb+cc+2ab-2ac-2bc237Please respect copyright.ＰＥＮＡＮＡRgIrr97U7G
1234 copyright protection233ＰＥＮＡＮＡwKceCo4ngT 尼

2ab-2ac-2bc=-2abc/3m237Please respect copyright.ＰＥＮＡＮＡm8MhgDf9pp
1234 copyright protection233ＰＥＮＡＮＡQmNLXBxP05 尼

ab-ac-bc=abc/(a+b-c)1234 copyright protection233ＰＥＮＡＮＡqIdpzwqErt 尼

abc=(a+b-c)(ab-ac-bc)1234 copyright protection233ＰＥＮＡＮＡsXnHdb8BzN 尼

4abc=aab-aac+abb-bbc+acc+bcc=ab(a+b)-c((a+b)^2-2ab)+cc(a+b)1234 copyright protection233ＰＥＮＡＮＡLe8IHkL2kA 尼

4abc=ab(a+b)-c(a+b)^2+2abc+cc(a+b)1234 copyright protection233ＰＥＮＡＮＡGAwD7JGhW9 尼

2abc=(a+b)(ab-ac-bc+cc)1234 copyright protection233ＰＥＮＡＮＡjflTgwZGY6 尼

2abc=(a+b)(a-c)(b-c)1234 copyright protection233ＰＥＮＡＮＡVnT5yxTXw5 尼

故6abc=(a+b-c)^3237Please respect copyright.ＰＥＮＡＮＡjrl5DjR5T1
1234 copyright protection233ＰＥＮＡＮＡaJ1ws8PxzE 尼

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