因式分解是初中代数中重要的一种恒等变形,其特点是把和差化成积的形式。作为一种数学方法,它在解题中的应用较广,有些问题,若能恰当使用因式分解,可使解题过程显得简捷明了,收到事半功倍的效果。本文举例说明它的应用。 Factorization is an important kind of constant deformation in junior high school algebra, which is characterized by the sum of difference and product. As a mathematical method, it is widely used in problem solving. In some problems, if factorization can be used properly, the problem-solving process can be simple and clear, and it can achieve a multiplier effect. This article illustrates its application.