已知xx yy 2x-6y 10=0求x,y的值已知xx+yy+2x-6y+10=0求x,y的值

来源：学生作业帮助网 编辑：六六作业网 时间：2024/12/20 04:19:37
已知xxyy2x-6y10=0求x,y的值已知xx+yy+2x-6y+10=0求x,y的值已知xxyy2x-6y10=0求x,y的值已知xx+yy+2x-6y+10=0求x,y的值已知xxyy2x-6

已知xx yy 2x-6y 10=0求x,y的值已知xx+yy+2x-6y+10=0求x,y的值
已知xx yy 2x-6y 10=0求x,y的值
已知xx+yy+2x-6y+10=0求x,y的值

已知xx yy 2x-6y 10=0求x,y的值已知xx+yy+2x-6y+10=0求x,y的值
x^2+y^2+2x-6y+10=0
x^2+2x+1+y^2-6y+9=0
(x+1)^2+(y-3)^2=0
x+1=0 x=-1
y-3=0 y=3

xx+yy+2x-6y+10
=X^2+2X+1+Y^2-6Y+9
=(x+1)^2+(y-3)^2=0
要使等式成立,必须X+1=0且Y-3=0
所以X=-1,Y=3

原式=x^2+2x+1+y^2-6y+9
=(x+1)^2+(x-3)^2
=0
x=-1
y=3

xx+yy+2x-6y+10=0
xx+2x+1 +yy-6y+9 =0
(x+1)*(x+1) +(y-3)*(y-3)=0
要使等式成立,必须
x+1=0 且y-3=0
x= -1, y= 3.

xx+yy+2x+6y+10=xx+2x+1+yy-6y+9=(x+1)(x+1)+(y-3)(y-3)=0,
只有(x+1)(x+1)和(y-3)(y-3)同时等于0才能成立,否则大于0,所以,只有小x=-1；y=3.

xx+yy+2x-6y+10
=xx+yy+2x-6y+1+9
=xx+2x+1+yy-6y+9
=(x+1)(x+1)+(y-3)(y-3)
=0
所以x+1=0,解得x=-1
y-3=0,解得y=3

不难啊

简单啊楼上的答案都对啊x=-1,y=3

已知xx+yy+4x-6y+13=0,求（xx-2x）/xx+3yy的值. xx+2x+yy+6y+10=0求xx+yy的值 已知2x=3y,求xy/xx+yy-yy/xx-yy的值 若xx+yy-2x-6y+10=0,求分式（xx-yy）/xy的值. 已知xx yy 2x-6y 10=0求x,y的值已知xx+yy+2x-6y+10=0求x,y的值 若xx-2x+yy+6y+10=0 求xx-yyy的值 若xx-2x+yy+6y+10=0 求xx-yyy的值 已知x(x-1)-(xx-y)=-3求xx+yy-2xy 已知x（x+1)-(xx+y)=3,求(xx+yy)/2-xy的值 已知 xx-2x+yy+6y+10=0 求x+y的值快点．快点．急求． 已知14(XX+YY+ZZ)=(X+2Y+3Z)^2,求X:Y:Z 已知xx+yy-4x-6y+13=0求3x+4y的值 已知XX+YY+4X-6Y+13=0,则X的Y次方是 已知：xx+yy-8x+12y+52=0,求：x/y-y/x=多少 若(xx)+(yy)-4x+6y+13=0,求2x+3y的值? 已知（x-2）2+1y-31=0,求xx+yy-xy-yx的值. 已知（x-2）2+1y-31=0,求xx+yy-xy-yx的值 x(x+1)-(xx+y)=-3,求(xx+yy)/2-xy的值