已知x^2+y^2-6x-8y+25=0,则xy=
已知x^2+y^2-6x-8y+25=0,则xy=
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的平方+y的平方-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
已知1/X^2 +1/Y^2 -6/X -8/Y +25=0求X+Y/XY的值
已知xy/x+y=2,则代数式3x-5y+8y/-x+3xy-y的值
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
已知实数x满足x^2+2xy+y^2-(x+y)-6=0则x+y的值
已知x+y=6,xy=-3,则x^2y+xy^2=?
已知x+y=6,xy=-3,则x^2y+xy^2=
已知3x*+xy-2y*=0,求(x/y)-(y/x)-(x*+y*)/(xy)的值.*是平方
已知1/x=1/y=6,则3x-2xy+3y/3xy+x+y=?