若x^2-2x+y^2+8y+17=0,则x= ,y=
设x>1,y>0,若x^y+x^-y=2根号2,则x^y-x^-y等于
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
已知x*x+4x+y*y-2y+5=0,则x*x+y*y=?
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*
若3x-4y=0,则x/y=______,(x-y)/y=______,(3x+2y)/(2x+3y)=_____.
[x(x-y)-y(x-y)+(x+y)(x-y)]÷2x其中x=2012 y=2013
若x,y满足|2x-y-3|+|3x+2y+1|=0,则x= y=
若x^2+y^2-8x-10y+41=0,求x/y+y/x的值
若x,y为正数,且2*x+8*y-x*y=0,求x+y的最小值
若x的平方-2y+y的平方+8y+17=0,则x= ,y=