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配方法是根据完全平方式a~2±2ab+b~2=(a±b)~2,把一个代数式(或代数式的一部分)写成完全平方式或几个完全平方式的和的形式,是进行代数式恒等变形的极其重要的一种方法,在初中阶段有着广泛的应用.同样,配方法在因式分解中也有不俗的表现.现列举几例,供同学们参考.一、分解二项式例1把4x~4+1分解因式.分析题目中4x~4、l都是完全平方数,因此可在4x~4和1之间配中间项4x~4,凑成完全平方式,然后再用平方差公式进行因式分解.
The method is based on the complete flat a ~ 2 ± 2ab + b ~ 2 = (a ± b) ~ 2, an algebraic (or algebraic part of) written as a complete flat form or several complete flat form and is An algebraic equal deformation of an extremely important method, has a wide range of applications in the junior high school. Similarly, with the method of factoring in the decent performance .Considering a few examples for reference. Example 1 to 4x ~ 4 + 1 factorization analysis of the problem 4x ~ 4, l are completely square, it can be in the 4x ~ 4 and 1 with the middle of the 4x ~ 4, make up completely flat , And then factorized using the square difference formula.