因式分解是初中数学重要的恒等变形,是后继学习的重要基础.分式的加、减、乘、除,代数式求值、化简、四则运算,一元二次方程的求解过程都离不开它.有些学生在学习时经常出现错误,为帮助学生灵活运用法则,掌握化简技巧,现就一些问题给予辨析和纠正,供参考. Factorization is an important constant deformation in junior high school mathematics, and it is an important basis for follow-on learning. Addition, subtraction, multiplication, and division of fractions, algebraic expression evaluation, simplification, and four operations, the solution process of one-member quadratic equations Open it. Some students often make mistakes while learning. To help students use the rules flexibly, to master the simplification techniques, we now analyze and correct some issues for reference.