已知 x²-2x+y²+6y+10=0,则x+y=?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/03 23:44:14
![已知 x²-2x+y²+6y+10=0,则x+y=?](/uploads/image/z/1257713-17-3.jpg?t=%E5%B7%B2%E7%9F%A5+x%26%23178%3B-2x%2By%26%23178%3B%2B6y%2B10%3D0%2C%E5%88%99x%2By%3D%3F)
已知 x²-2x+y²+6y+10=0,则x+y=?
已知 x²-2x+y²+6y+10=0,则x+y=?
已知 x²-2x+y²+6y+10=0,则x+y=?
x²-2x+y²+6y+10=0
x²-2x+1+y²+6y+9=0
(x-1)²+(y+3)²=0
x-1=0 y+3=0
x=1 y= -3
所以:
x+y=1-3= -2
x²-2x+y²+6y+10=0
(x-1)^2+(y+3)^2=0
x-1=0 y+3=0
x=1 y=-3
x+y=-2