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公式是解题的重要工具，灵活巧妙地使用公式，可使问题迅速地得到解决．本文向同学们介绍应用乘法公式的几个技巧．一、巧结合例1计算：（2a＋1）（2a－1）（4a2＋2a＋1）（4a2－2a＋1）．抛原式一〔（2a＋1）（4a2－2a＋1）〕［（2a－1）（4a2＋2a＋1）〕=（8a3+1）（8a3－1）
The formula is an important tool for problem solving. Using formulas flexibly and flexibly, problems can be solved quickly. This article introduces students to several techniques for applying the multiplication formula. First, the clever combination of Example 1 is calculated: (2a+1)(2a-1)(4a2+2a+1)(4a2-2a+1). Throw the original formula one [(2a+1)(4a2-2a+1)][(2a-1)(4a2+2a+1)]=(8a3+1)(8a3-1)