因式分解是初中代数中重要的恒等变形 之一,在化简、求值、解方程(不等式)、证明 恒等式(不等式)等许多问题中的应用极为广 泛．因式分解虽然方法不多,但解法十分灵 活,技巧性很强．因此要学好这部分内容,除 了熟练掌握课本上介绍的基本方法外,很有 必要了解一些因式分解的特殊方法,以开拓视 野,提高解题能力． Factorization is one of the important constant deformations in junior high school algebra. It is widely used in many problems such as simplification, evaluation, solving equations (inequalities), and proving identities (inequalities). Although there are few methods for factorization, the solution is very flexible and skillful. Therefore, to learn this part of the content, in addition to mastering the basic methods introduced in textbooks, it is necessary to understand some special methods of factorization to open up the field of vision and improve the ability to solve problems.