已知x^2+4y^2-6x+4y+10=0,求xy的值.

已知：4x^2+y^2-4x-6y+10=0,求y/x-x/y的值 已知x^2+y^2-2x-6y+10=0,求4(x^2+y)(x^2-y)-(2x^2-y)^2 已知x²+y²-2x-6y+10=0,求4(x²+y)(x²-y)-(2x²-y)² 已知x^2+y^2+13-4x+6y=0,求(2x-y)^2-2(2x-y)(x+2y)+(x+2y)^2 已知x+y=4,x^2+y^2=10,求(x-y)^2 已知：x^2+y^2+4x-6y+13=0,求x^y值. 已知x-2y=2,求4x-y-8分之3x+y-6 已知-x+y=3,则2(x-y)2次方-4(x-y)+6 已知|5x-y-8|+(7y-x+2)=0则4x+6y 已知,x^2+y^2-6x+2y+10=0,求(x+2y)^2(x-2y)^2-(x-2y)(x^2+4y^2)(x+2y)的值. 已知2y-x=-3,求[4y(2x-y)-2x(2x-y)]/(2x-y 已知x/y=2,求2x(x+y)-y(x+y)/4x²-4xy+y² 已知X,Y,满足(X+3Y)(X-3Y)=-10(Y^2-6/5)和2X(Y-1)+4(1/2X-1)=0 （X+Y)^2 X^2Y+XY^2注：*/* 是分数 已知x*x+4x+y*y-2y+5=0,则x*x+y*y=? 已知(X+3)^2+|y+6|=02(3x-3y)-4(x-y)-2(x-y) 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.x+y.y+8x+6y+25=0,求代数式(x.x-4y.y)/(x.x+4xy+4y.y)-x/(x+2y)的值 已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y 就是已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y /4y就是除以4y