分解因式是分式约分和通分的基础.复习这部分知识时,同学们应注意从以下几点把握.一、分解因式的概念把一个多项式化成几个整式的积的形式,这种变形叫做把这个多项式分解因式.分解因式时要注意以下三点.1.分解因式的对象是多项式,即等式左边必须是多项式. The factor of decomposition is the basis of fractional division and division. When reviewing this part of the knowledge, students should pay attention to the following points. First, decompose the concept of factorization to convert a polynomial to a product of several integral equations. This kind of transformation is called decomposing this polynomial factor. The following three points must be noted when decomposing the factor. 1. The factor of the factorization factor is a polynomial, that is, the left side of the equation must be a polynomial.