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:学生作业帮助网 编辑:作业帮 时间:2024/11/30 02:54:28
x)x`F˙K^Z
Ԯ|C= I6IEVGv6h[G*Ԕ
-uJhH f6L5.`@A6n~qAb( `
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
(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)
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