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完全平方公式(a±b)2=a2±2ab+b2是初中数学中最基本的公式之一,有着十分广泛的应用.若能灵活使用该公式,则能巧妙解答一类竞赛题.现举几例,供同学们参考.
The complete square formula (a±b)2=a2±2ab+b2 is one of the most basic formulas in junior high school mathematics, and has a very wide range of applications. If you can use this formula flexibly, you can solve a class of competition problems ingeniously. Several examples for students’ reference.