(x²-y²)/(x-y)-2x+y

来源：学生作业帮助网编辑：六六作业网时间：2024/11/24 02:23:35

(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

(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。