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.
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.
已知非零有理数x,y满足x²-4xy+4y²=0,求(x-y)/(x+y)的值
已知非零实数x,y满足x²-4xy+4y²=0,求分式2x-y除以2x+y的值
若有理数X、Y满足x²-4x+y²+6y+13=0,求xy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x,y为非零自然数且满足2x^2+xy-3y^2=0,求x-y/x+y的值
已知有理数x,y满足xy=4,x+y=7,则x²y+xy²=()?
已知x,y满足x(+1)-(x²+2y)=1,求x²+4xy+4y²-2x+4y的值.
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
已知x/y=2,求2x(x+y)-y(x+y)/4x²-4xy+y²
已知实数x,y满足x²+y²-xy+2x-y+1=0 求x y
若是数xy满足x²+4x+y²-6y+13=0,求x,y的值