因式分解是学习的重点之一 ,同学们在解题中容易出错 ,现将常见的错误归纳成八个方面 ,进行错因分析 ,帮助同学们在学习因式分解时 ,自觉纠正错误。1 符号错误这是初学因式分解时的常见病和多发病 ,特别在添去括号时容易出现的错误。错例 1　 5 (x - y) 3+10 (y -x) 2　　　 =5 The factorization is one of the focuses of the study. The students are prone to making mistakes in solving problems. Now the common mistakes are summarized into eight aspects, and the cause analysis is performed to help the students to conscientiously correct mistakes while learning the factorization. 1 Symbol error This is a common and frequently-occurring disease in the process of factoring for beginners, and it is especially prone to errors when adding parentheses. Error 1 5 (x - y) 3+10 (y -x) 2 =5