x²+y²-8x-10y+41=0,求x/y-y/x的值.
已知x²+4y²-6x+8y+13=0,求x-y/x+y的值.
若x^2+y^2-8x-10y+41=0,求x/y+y/x的值
已知非零有理数x,y满足x²-4xy+4y²=0,求x-y/x+y-y-x/x+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y-2x=0,求3x²-2y²/(x+y)(x-y)的值
x²+4y²-2x+12y+10=0求X,Y值
已知/x/+x+y=10,/y/+x-y=12.求x+y的值
已知|3x-y|+|x+y|=0,求x-y除以x*y的值.
已知x.x+y.y-6x-8y+25=0,求3x.x+5y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x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
如果2x-y=10,求代数式[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值