三次方公式 工程亮资网 2025-09-06 (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... 阅读更多