(x²-y²)/(x-y)-2x+y
来源:学生作业帮助网 编辑:作业帮 时间:2024/05/07 20:30:16
(x²-y²)/(x-y)-2x+y
(x²-y²)/(x-y)-2x+y
(x²-y²)/(x-y)-2x+y
原式=(x+y)(x-y)/(x-y)-2x+y=x+y-2x+y=2y-x
(x²-y²)/(x-y)-2x+y
=(x+y)(x-y)/(x-y)-2x+y
=x+y-2x+y
=2y-x
说明:x≠y,要不然分母为0。
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来源:学生作业帮助网 编辑:作业帮 时间:2024/05/07 20:30:16
(x²-y²)/(x-y)-2x+y
(x²-y²)/(x-y)-2x+y
(x²-y²)/(x-y)-2x+y
原式=(x+y)(x-y)/(x-y)-2x+y=x+y-2x+y=2y-x
(x²-y²)/(x-y)-2x+y
=(x+y)(x-y)/(x-y)-2x+y
=x+y-2x+y
=2y-x
说明:x≠y,要不然分母为0。