【x平方除以(x+y)】-x+y=

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/23 20:51:39
【x平方除以(x+y)】-x+y=【x平方除以(x+y)】-x+y=【x平方除以(x+y)】-x+y=x²/(x+y)-x+y=x²/(x+y)-(x²-y²)

【x平方除以(x+y)】-x+y=
【x平方除以(x+y)】-x+y=

【x平方除以(x+y)】-x+y=
x²/(x+y)-x+y
=x²/(x+y)-(x²-y²)/(x+y)
=[x²-(x²-y²)]/(x+y)
=y²/(x+y)

x²/(x+y)-x+y
=x²/(x+y)-(x-y)
=x²/(x+y)-(x+y)(x-y)/(x+y)
=[x²-(x²-y²)]/(x+y)
=y²/(x+y)
望采纳

=x²/(x+y)-(x-y)
=x²/(x+y)-(x+y)(x-y)/(x+y)
=[x²-(x²-y²)]/(x+y)
=y²/(x+y)
望采纳