【摘 要】
：
分组分解法分解因式的关键是正确分组.现结合实例介绍正确分组的几种方法. 一、先看系数,后分组例1 分解因式x3+x2-2x-2. 分析此式的前两项、后两项系数之比均为1:1,故可考
【机 构】
：
广东省平远县教师进修学校 514600
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分组分解法分解因式的关键是正确分组.现结合实例介绍正确分组的几种方法. 一、先看系数,后分组例1 分解因式x3+x2-2x-2. 分析此式的前两项、后两项系数之比均为1:1,故可考虑将它们各分为一组. 解原式=(x3+x2)-(2x+2) =x2(x+1)-2(x+1) =(x+1)(x2-2).
The key factor of the factorization of group decomposition is correct grouping. Now we introduce some methods of grouping correctly with examples. First, look at the coefficients, then group the example 1 factorization factor x3+x2-2x-2. Analyze the first two parts of this formula. The ratio of the term and the last two coefficients is 1:1, so it is considered that they are each divided into a group. The solution primitive =(x3+x2)-(2x+2)=x2(x+1)-2( x+1) = (x+1)(x2-2).
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