若x^2-2x+y^2+6y+10=0,则x=()
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2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
7.X*X+2X+Y*Y-6Y+10=0,则xy=?
已知:x²y²-2x+6y+10=0则x+y=
x²-2x+y²+6y+10=0,则x+y=?
x^2+6x+y^2+4x+10=0,则x+y等于多少?
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
若实数X,Y满足X²+Y²+4X-2Y +1=0,则X²-6X+Y²-2Y的最大
已知x*x+4x+y*y-2y+5=0,则x*x+y*y=?
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x的平方-2x+y的平方+6y+10=0,则x=?,y=?