已知x2+y2-2x+6y+10=0,则x+y的值为?
已知x2-2x+y2+6y+10=0,求(2x-y)的值
已知:x2+2x+y2-6y+10=0,求x,y的值.
已知x2+y2+2x-6y+10=0,求x+y的值.
已知x2+y2-10x-6y+34=0,求y\x+y的值
已知x2-2x+y2+6y+10=0,求多项式(2x+y)(2x-y)+(x+y)2-2(2x2-xy)的值
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,则x+2y的值为______.
已知x,y为实数,且(x2 +y2)(x2 +y2+2)=3.求x2 +y2的值
已知:x2+y2-10x-2y+26=0,求x、y的值.
已知x2+y2-10x-6y+34=0,求(x-y/x+y)2÷x2-y2/xy×x2+2xy+y2/x2-xy 的值.
已知X2-2x+y2+6y+10=0,求(x2-2xy)/(xy+y2)的值
已知xy满足x2+y2-6x+2y+10=0,求立方根号x2-y2的值