多次元公式

a^5 + b^5 - (ab)^2(a+b) = a^5 + b^5 - a^3b^2 - a^2b^3
= a^3(a^2 - b^2) - b^3(-b^2 + a^2)
= (a^3 - b^3)(a^2 - b^2) = (a-b)(a^2 + ab + b^2)(a +b)(a-b)
= (a +b)(a-b)^2(a^2 + ab + b^2).

a5+b5-(ab)2(a+b)
=a5+b5-a3b2-a2b3

2008-08-17 23:26:38 補充：
其實我唔太明白你的問題,你給下面最佳~