x根号x-y根号y除以x+根号xy+y(x根号x-y根号y)除以(x+根号xy+y)

来源:学生作业学帮网 编辑:学帮网 时间:2024/05/07 13:17:55

x根号x-y根号y除以x+根号xy+y
(x根号x-y根号y)除以(x+根号xy+y)

x根号x-y根号y除以x+根号xy+y
=(√x³-√y³)÷(√x²+√xy+√y²)
=(√x-√y)(√x²+√xy+√y²)÷(√x²+√xy+√y²)
=√x-√y