若(2x-3y+5)2+|x+y-2|=0,则x,y等于( )
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于
设x>1,y>0,若x^y+x^-y=2根号2,则x^y-x^-y等于
若/x+y-2/+(2x-3y+6)的平方等于0则x=( )y=( )
若X-Y的绝对值+(Y-2)的平方=0,则X+Y等于
若实数X,Y满足√X+2Y-4+{(2X+Y-5)*(2X+Y-5)}=0,则(X+Y)*(X+Y)等于什么?
若x,y互为相反数(y≠0),则2x+5+2y+3x/y=____
已知x+y+2(-x-y+1)=3(1-y-x)-4(y+x-1),则x+y等于( )
若(3x+2y)^2+/2x+3y+5/=0,则x,y分别等于多少?
若实数x,y满足x的平方+y的平方-4x-2y+5=0,则(x+y)/2x-3=
已知x-5y=0(y≠0),则代数式2x-3y/3x+6y
(x-y)的四次方(x-y)-2(x-y)²(y-x)³等于?