x2+y2+2x-6y+10=0

若X2+Y2-2X-6Y+10=0,求（x2-y2)/xy的值10拆成1+9X2-2X+1+Y2-6Y+9=0(X-1)2+(Y-3)2=0平方大于等于0,相加等于0,若有一个大于0,则另一个小于0,不成立.所以两个都等于0所以X-1=0,

已知x2+y2-10x-6y+34=0,求（x-y/x+y）2÷x2-y2/xy×x2+2xy+y2/x2-xy的值.你好x²+y²-10x-6y+34=0（x-5）²+（y-3）²=0每项都大于等于

已知X2-2x+y2+6y+10=0,求（x2-2xy）/(xy+y2)的值x²-2x+y²+6y+10=0,变换得(x-1)²+(y+3)²=0,∴x=1,y=-3∴（x2-2xy）/(xy+y2)

已知xy满足x2+y2-6x+2y+10=0,求立方根号x2-y2的值条件变换：(x-3)^2+(y+1)^2=0即：y+1=0x-3=0所以：立方根号x2-y2=2x2+y2-6x+2y+10=0(x-3)^2+(y+1)^2=0=>x=

已知x2+y2+4x-6y+13=0求x2-2x\x2+3y2即(x²+4x+4)+(y²-6y+9)=0(x+2)²+(y-3)²=0所以x+2=y-3=0x=-2,y=3所以原式=(4+4)/(4

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X2+Y2+8X+6Y+25=0x²+8x+16+y²+6y+9=0(x+4)²+(y+3)²=0∴

X2+Y2+8X+6Y+25=0求代数式(x2-4y2/x2+4xy+4y2)-x/x+2yX2+Y2+8X+6Y+25=0x^2+y^2+8x+6y+25=0x^2+8x+16+y^2+6y+9=0(X+4)^2+(y+3)^2=0x=-

第一题已知x2+y2-6x-2y+10=0,则x+y/x-y第二题x2/3xy=()/15y2第三题6x/8x（y-1）2=（）/24（y-1）3已知x2+y2-6x-2y+10=0,则x+y/x-yx²+y²-6x-2

第一题已知x2+y2-6x-2y+10=0,则x+y/x-y第二题x2/3xy=()/15y2第三题6x/8x（y-1）2=（）/24（y-1）3已知x2+y2-6x-2y+10=0,则x+y/x-yx²+y²-6x-2

1.已知X2-2X+Y2+6Y+10=0(X2表X的平方.Y2表Y的平方求(X+3Y)的平方2.两方程式解三未知数:已知X+100=n2(n的平方）X+168=m2X．n.m为正整数．求n.m.x=第一题:X2-2X+1+Y2+6Y+9=0

若x2-2x+10+y2+6y=0,求(2x+y)2x2-2x+10+y2+6y=0x²-2x+1+y²+6y+9=0(x-1)²+(y+3)²=0x-1=0y+3=0∴x=1y=-3(2x+y)&#

若X2+2X+Y2-6Y+10=0,则X+Y=?原式可化为x²+2x+1+y²-6y+9=0(x+1)²+(y-3)²=0平方和为0,则x+1=0,y-3=0x=-1,y=3x+y=2可化为（x+1)

X2+y2+2x-6y+10=0则x-y=x^2+y^2+2x-6y+10=x^2+2x+1+y^2-6x+9=(x+1)^2+(y-3)^2=0因为：（x+1）^2>=0（y-3）^2=0所以：x=-1y=3x-y=-1-3=-4.X^2

已知x2+y2-2x-6y+10=0,则4/(y+1/x)=x^2+y^2-2x-6y+10=0x^2-2x+4+y^2-6y+6=0(x-2)^2+(y-3)^2=0x-2=0x=2y-3=0y=34/[y+(1/x)]=4/[3+(1/

已知x2-2x+y2+6y+10=0,求（2x-y)的值把10拆成1+9(x²-2x+1)+(y²+6y+9)=0(x-1)²+(y+3)²=0平方大于等于0,相加等于0若有一个大于0,则另一个小于0

若x2-2x+y2+6y+10=0,求x,y的值x2-2x+y2+6y+10=0x^2-2x+1+y^2+6x+9=0(X-1)^2+(Y+3)^2=0则x-1=0y+3=0所以x=1,y=-3若x2-2x+y2+6y+10=0，求x,y的

已知x2+y2-2x+6y+10=0,则x+y的值为?即(x²-2x+1)+(y²+6u+9)=0(x-1)²+(y+3)²=0所以x-1=y+3=0x=1,y=-3所以x+y=-2x2+y2-2x+

已知x2+2x+y2-6Y+10=0,求X+Y的值答：x^2+2x+y^2-6y+10=0(x^2+2x+1)+(y^2-6y+9)=0(x+1)^2+(y-3)^2=0完全平方数为非负数所以：x+1=0y-3=0解得：x=-1,y=3所以

已知x2+4x+y2-10y+29=0,求x+2y/x2-2y2的值（X+2）方＋（Y-5）方＝0所以X=-2Y=5把值代进去就行了.

已知x,y满足x2+y2-6x-2y+5=0,求x2+y2的最大值x2+y2-6x-2y+5=0(x-3)^2+(y-1)^2=5表示一个圆,圆心坐标（3,1）x^2+y^2表示圆上一点（x,y)到原点的距离的平方.画图就看出,最大距离是：