(2xy-y)-(-y+xy)=
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/29 10:23:24
(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
(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