若(2x^2+2y^2)(x^2-2+y^2)-16=0,求x^2+y^2的值
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
若|x+y-1|+(x-y-2)²=0,求代数式(x+2y)(x-2y)-(2x-y)(-y-2x)的值.
已知2/x+2/y=根号24,求 x/y(x-y) - y/x(x-y)的值
已知2/x 2/y=根号24,求 x/y(x-y) - y/x(x-y)的值
若x^2+y^2-8x-10y+41=0,求x/y+y/x的值
若X,Y互为相反数,且(X+Y+3)(X-Y-2)=0,求X,Y的值?
已知x-y/x=x/x-2y(y不等于0),求x:y的值
已知x-y/x=x/x-2y(y不等于0),求x:y的值
若x-y/x+y=5,求x-y/2x+2y+5x+5y/3x-3y的值
已知:x+2y=2011 求代数式{(x^+y^)-(x-y)^+2x(x+y)}/2x的值
已知X.x+y.y-4x+2y+5=0,求4X.X-12X Y+9Y.y的值
已知x+y/y=11/8,求x-y/x+2y的值.