若x*2+y*2-2x-6y+10=0,求(x*2-y*2)/xy=?
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
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2x平方+3xy-2y平方=0,求x+y/x-y
x^2-2xy+y^2+6y+10=0求x,y的值.
x的平方-2xy+y的平方-6y+10=0,求x,y
已知xy=-2,x-y=3,求(x+y)(x-y)-y^2+(x-y)^2-(6x^2y-2xy^2)÷2y
若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+y)的值
已知3x^2+xy-2y^2=0,求{(x+y)/(x-y)+4xy/(y^2-x^2)}/{(x+3y)*(x-y)}
已知xy=2,x-y=3,求(x+y)(x-y)-y^2-(6x^2y-2xy^2)/2y的值.
已知xy=-2,x-y=3,求(x+y)(x-y)-y平方+(x-y)平方-(6x2y-2xy平方)/2y的值
已知3x*+xy-2y*=0,求(x/y)-(y/x)-(x*+y*)/(xy)的值.*是平方
若根号x+y-3+绝对值xy+x+y-2=0,求x/y+y/x