已知非零实数x,y满足等式x2-xy-2y2=0 ,快来看看!
已知非零实数x,y满足:x2+xy-2y2=0,求(x2+3y+y2)/(x2+y2)的值
已知实数x、y满足2x2-7xy+3y2=0,求x:y
已知x2-2xy=3y2且x,y为非零实数 求:(1)2x+y/x-2y (2)2x2-3y2+5xy/x2+xy+y2
已知实数x,y满足x2+xy+y2=3,则x2-xy+y2的最小值
已知实数x,y满足(x2)+(y2)-xy+2x-y+1=0,求x,y的值
已知实数x、y满足X2+y2-xy+2x-y+1=0,试求x、y的值
已知x、y是实数且满足x2+xy+y2-2=0,设M=x2-xy+y2,则M的取值范围是______.
已知实数x,y满足等式x2+y2=4,求x+y的最大值
已知非零实数x、y满足x-5(√xy)-6y=0,则x/y
已知实数x,y 满足x2+y2+2x=0则x+y得最小值
已知实数x,y满足x2+y2-2x+4y=0,则x2+y2的最小值是
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