化简2b²+(a+b)(a-b)-(a-b)²

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/06 17:30:48
化简2b²+(a+b)(a-b)-(a-b)²

化简2b²+(a+b)(a-b)-(a-b)²
化简2b²+(a+b)(a-b)-(a-b)²

化简2b²+(a+b)(a-b)-(a-b)²

2B2+(A2-B2)-A2-B2+2AB
2B2+2AB


2b²+(a+b)(a-b)-(a-b)²
=2b²+a²-b²-a²+2ab-b²
=2ab

=2b^2+a^2-b^2-(a^2+b^2-2ab) = 2ab