因式分解是中学数学的一个重要组成部分。本文对因式分解的一些方法、技巧进行了如下总结（考虑到前四种方法在教材中已作了详细介绍，在此仅作简要介绍）。1拆项法在分解因式中，不能直接进行分组分解时，可以先通过拆项，对原式恒等变形，再分组。本法的关键：把多项式中某一 Factorization is an important part of high school mathematics. In this paper, some methods and techniques of factorization are summarized as follows (taking into account the first four methods have been described in detail in the textbook, only a brief introduction here). 1 demolition method In the factorization factor, can not be directly decomposed, you can first demolition item, the original equal deformation, sub-group. The key of this law: put one of the polynomials