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虽然对因式分解的学习 ,课本循序渐进地介绍三种方法 ,利于学生理解 .但是在学习过程中 ,因式分解往往包含多种方法 ,需要同时展开 .下面举例说明之 .例 1 将多项式a2 -b2 +4a +4b因式分解 .原式 =(a2 -b2 ) +( 4a +4b)=(a +b) (a -b) +4 (a+b)=(a +b) (a -b+4 ) .第一步先分?
Although the study of factorization, the textbook introduces three methods step by step to facilitate students’ understanding. However, in the learning process, factorization often contains multiple methods that need to be expanded at the same time. Examples are given below. Example 1 Polynomial a2 - B2 +4a +4b factorization.Formula=(a2 -b2) +( 4a +4b)=(a +b) (a -b) +4 (a+b)=(a +b) (a - b+4). The first step to divide?