(x+y/x²-y²)-2(x+y)解一下谢谢
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/20 01:02:44
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(x+y/x²-y²)-2(x+y)解一下谢谢
(x+y/x²-y²)-2(x+y)解一下谢谢
(x+y/x²-y²)-2(x+y)解一下谢谢
(x²-y²)/(x+y)-2(x+y)
=[(x+y)(x-y)]/(x+y)-2(x+y)
=(x-y)-2(x+y)
=x-y-2x-2y
=-x-3y
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来源:学生作业帮助网 编辑:作业帮 时间:2024/06/20 01:02:44
(x+y/x²-y²)-2(x+y)解一下谢谢
(x+y/x²-y²)-2(x+y)解一下谢谢
(x+y/x²-y²)-2(x+y)解一下谢谢
(x²-y²)/(x+y)-2(x+y)
=[(x+y)(x-y)]/(x+y)-2(x+y)
=(x-y)-2(x+y)
=x-y-2x-2y
=-x-3y