人教版初中《代数》第二册第八章介绍了因式分解的提取公因式法,运用公式法,分组分解法以及ｘ2+(ｐ+ｑ)ｘ+ｐｑ型式子的因式分解,其中的分组分解法是这几种方法中的重点和难点.本文介绍分组分解因式的几种基本思路,以帮助读者学好这部分的内容.一.直接分组1.按公因式分组例1　 The eighth edition of the second edition of the second edition of the People’s Education Press “Algebra” introduces the factorization method of factorization, using the formula method, the group decomposition method, and the factorization of x2+(p+q)x+pq type, where The group decomposition method is the focus and difficulty of these methods. This paper introduces several basic ideas of grouping factor to help the reader to learn the contents of this part. I. Direct grouping 1. Grouping by common factor