若X2+Y+2x-4根号y+5=0,求根号xy
问题描述:
若X2+Y+2x-4根号y+5=0,求根号xy
答
x^2+2x+1+y-4根号y+4=0
(x+1)^2+(根号y-2)^2=0
x+1=0,根号y-2=0
x=-1,y=4
题目好像打错了