求方程5x2-6xy+2y2-4x+2y+1=0的实数根
已知x2+4y2+x2y2-6xy+1=0,求 x4-y4/2x-y 乘 2xy-y2/xy-y2 除以(x2+y2/x
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
已知非零实数x,y满足:x2+xy-2y2=0,求(x2+3y+y2)/(x2+y2)的值
若X2+Y2-2X-6Y+10=0 ,求(x2-y2)/xy的值
已知实数x,y满足方程x2+y2-4x+1=0求x2+y2+2x的最值
已知X2+Y2+8X+6Y+25=0 求代数式X2++XY+4Y2分之X2-4Y2 减X+2Y分之X的值
已知实数x、y满足x2 4xy 4y2 x 2y-6=0,求6/x 2y的值
已知实数x,y满足x2+y2-xy+x-1/2y+1/4=0 试求x,y的值
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2x2-7xy+3y2=0,求x:y
已知x2-3xy-4y2的绝对值+2倍根号x2+4xy+4y2-1=0 求3x+6y的值