则2x=-y≠0,则分式xy/x²-y²的值为在线等哦.快点呐.

来源：学生作业帮助网编辑：作业帮时间：2024/05/03 19:39:47

则2x=-y≠0,则分式xy/x²-y²的值为在线等哦.快点呐.
则2x=-y≠0,则分式xy/x²-y²的值为在线等哦.快点呐.

则2x=-y≠0,则分式xy/x²-y²的值为在线等哦.快点呐.
2x=-y
y/x=-2
xy/(x²-y²) (上下同除以x^2)
=(Y/X)/(1-(y/x)^2)
=2/3

则2x=-y≠0,则分式xy/x²-y²的值为 在线等哦.快点呐.