方程10x^2-16xy+8y^2+6x-4y+1=0 则x-y等于?
解方程x四方-x²+2xy+y²+1=0 x²+2xy+6x+2y²+4y+10
解方程:x²+2xy+6x+2y²+4y+10=0
7.X*X+2X+Y*Y-6Y+10=0,则xy=?
若x+y=-1,则x^4+5x^3y+x^2y+8x^2y^2+xy^2+5xy^3+y^4=( )
整数x,y满足方程2xy+x+y=83,则x+y等于多少?(两个答案)
实数X,Y满足X大于等于Y大于等于1和2X平方-xy-5x+y+4=o,则x+y的值
解方程x^2y^2-8xy+4x^2+y^2+4=0
已知x.x+y.y+8x+6y+25=0,求代数式(x.x-4y.y)/(x.x+4xy+4y.y)-x/(x+2y)的
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
已知x分之1+y分之1=-2,则x+xy+y分之x-xy+y的值等于
整数x,y满足方程2xy+x+y=83,则x+y怎么算
已知x^2-5xy+6y^2=0,则y:x等于