-2(ab-3a²)-[2b²-(5ab+a²)+2ab] ,

来源：学生作业帮助网编辑：六六作业网时间：2024/10/08 16:46:57

-2(ab-3a²)-[2b²-(5ab+a²)+2ab],-2(ab-3a²)-[2b²-(5ab+a²)+2ab],-2(ab-3a&#

-2(ab-3a²)-[2b²-(5ab+a²)+2ab] ,
-2(ab-3a²)-[2b²-(5ab+a²)+2ab] ,

-2(ab-3a²)-[2b²-(5ab+a²)+2ab] ,
-2(ab-3a²)-[2b²-(5ab+a²)+2ab]
=-2ab+6a²-[2b²-5ab-a²+2ab]
=-2ab+6a²-2b²+5ab+a²-2ab
=ab+7a²-2b²