已知xy≠0,且根号(4x^2y^2)=-2xy,则有 √(23-6√(10-4√(3+2√2)))=?已知xy≠0,且根号(4x^2y^2)=-2xy,则有 A.xy0 C.x>0,y>0 D.x

问题描述:

已知xy≠0,且根号(4x^2y^2)=-2xy,则有 √(23-6√(10-4√(3+2√2)))=?
已知xy≠0,且根号(4x^2y^2)=-2xy,则有
A.xy0 C.x>0,y>0 D.x

I DON'T NO

已知xy≠0,且根号(4x^2y^2)=-2xy,则有
A.xy0 C.x>0,y>0 D.x-2xy>0==>xy