一、正确理解分解因式的定义所谓因式分解就是把一个多项式化为几个整式的积的形式,简记为“和差化积”.这个定义告诉我们:1.因式分解就是把多项式恒等变形成乘积形式,其结果必须是几个因式的乘积.如:x2+2y2-2x-xy2=x(x-2-y2)+2y2就不是因式分解;2.因式分解的结果中的几个因式必须是整式;3.因式分解的结果中各因式中的各项系数的最 First, the correct understanding of the definition of factorization The so-called factorization is the so-called factorization is a polynomial into several integer product form, abbreviated as “and the differential product ” This definition tells us: 1 factorization is The polynomial identity transformation into product form, the result must be the product of several factors. Such as: x2 + 2y2-2x-xy2 = x (x-2-y2) +2 y2 is not factorized; The factorization results in several factors must be an integral; 3 factorization results in each factor in the coefficient of the most