三次方公式
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三次方公式
(a+b)&sp3;=a&sp3;+3a&sp2;b+3ab&sp2;+b&sp3;；(a-b)&sp3;=a&sp3;-3a&sp2;B+3ab&sp2;-b&sp3;；a&sp3;+b&sp3;=(a+b)(a&sp2;-ab+b&sp2;)；a&sp3;-b&sp3;=(a-b)(a&sp2;+ab+b&sp2;) 次方最基本的定义是：设a为某数，n为正整数，a的n次方表示为aⁿ...
日期：2025-10-22 -
三次方公式是啥
三次方公式有：（A+B）&sp3;=A&sp3;+3A&sp2;B+3AB&sp2;+B&sp3;；（A-B）&sp3;=A&sp3;-3A&sp2;B+3AB&sp2;-B&sp3;；A&sp3;+B&sp3;=（A+B）（A&sp2;-AB+B&sp2;）；A&sp3;-B&sp3;=（A-B）（A&sp2;+AB+B&sp2;）；A&sp3;+B&sp3;+C&sp3...
日期：2025-10-18