(2xy-y)-(-y+xy)=    

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/29 09:52:38
(2xy-y)-(-y+xy)=    (2xy-y)-(-y+xy)=    (2xy-y)-(-y+xy)=

(2xy-y)-(-y+xy)=    
(2xy-y)-(-y+xy)=    

(2xy-y)-(-y+xy)=    
(2xy-y)-(-y+xy)
=2xy-y+y-xy
=2xy-xy-y+y
=xy