x-y\√x-√y分别进行不同方式的变形

来源：学生作业学帮网编辑：学帮网时间：2024/06/05 18:53:39

(x-y)/(√x-√y)
=(√x-√y)(√x+√y)/(√x-√y)
=√x+√y
(x-y)/(√x-√y)
=(x-y)(√x+√y)/(√x-√y)(√x+√y)
=(x-y)(√x+√y)/(x-y)
=√x+√y