(a+2分之1b)²-(a-2分之1b)²(a+2分之1b)²-(a-2分之1b)²
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/08 15:28:06
![(a+2分之1b)²-(a-2分之1b)²(a+2分之1b)²-(a-2分之1b)²](/uploads/image/z/2480385-57-5.jpg?t=%28a%2B2%E5%88%86%E4%B9%8B1b%29%26%23178%3B-%28a-2%E5%88%86%E4%B9%8B1b%29%26%23178%3B%28a%2B2%E5%88%86%E4%B9%8B1b%29%26%23178%3B-%28a-2%E5%88%86%E4%B9%8B1b%29%26%23178%3B)
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(a+2分之1b)²-(a-2分之1b)²(a+2分之1b)²-(a-2分之1b)²
(a+2分之1b)²-(a-2分之1b)²
(a+2分之1b)²-(a-2分之1b)²
(a+2分之1b)²-(a-2分之1b)²(a+2分之1b)²-(a-2分之1b)²
(a+2分之1b)²-(a-2分之1b)²
=[(a+2分之1b)+(a-2分之1b)][(a+2分之1b)-(a+2分之1b)]
=(2a)(b)
=2ab