将多项式分解因式，往往不能单一地使用某种方法，而是综合应用多种基本方法进行分解．解题的一骰思考途径是：1．先看多项式是否有公团式可提取，著有，应先提取公因式；2再看是否可用公式法或十字相乘法分解因式．3．若以上方法都不行，则应考虑用分组分解法分解因式：（1）? The polynomial factorization factor often cannot be used in a single method, but is instead decomposed using a variety of basic methods. One way to think about the problem is: 1. Let’s see if the polynomial has a public group type extractable. If you have, you should first extract the common factor; 2 look at whether you can use the formula method or cross multiplication to factorize. 3. If the above method is not feasible, you should consider using the group decomposition method to factorize: (1)?