x²+y²-6x+10y+34=0,则x+y的值是什么
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/08 14:36:22
![x²+y²-6x+10y+34=0,则x+y的值是什么](/uploads/image/z/3763162-10-2.jpg?t=x%26%23178%3B%2By%26%23178%3B-6x%2B10y%2B34%3D0%2C%E5%88%99x%2By%E7%9A%84%E5%80%BC%E6%98%AF%E4%BB%80%E4%B9%88)
x)PS64֮кfچ&:O;fVhW>aϳnx&H]v6ڦQkgQm
b*@`kP B`~qAbZ0ΙP5xY@
(Q HBlQ@@In e$c+V]:Dh~~,2q+DP\z\cTA {ںe>0((d w.6T
7,^S*#lʶ[# '
x²+y²-6x+10y+34=0,则x+y的值是什么
x²+y²-6x+10y+34=0,则x+y的值是什么
x²+y²-6x+10y+34=0,则x+y的值是什么
(x -3)^2 + (y+5)^2 = 0
x =3 y = -5
x+y = -2
﹙x²-6x+9﹚+﹙y²+10y+25﹚=0
﹙x-3﹚²+﹙y+5﹚²=0
∵ ﹙x-3﹚²≥0, ﹙y+5﹚²≥0
又: ﹙x-3﹚²+﹙y+5﹚²=0
∴ x-3=0, x=3
y...
全部展开
﹙x²-6x+9﹚+﹙y²+10y+25﹚=0
﹙x-3﹚²+﹙y+5﹚²=0
∵ ﹙x-3﹚²≥0, ﹙y+5﹚²≥0
又: ﹙x-3﹚²+﹙y+5﹚²=0
∴ x-3=0, x=3
y+5=0, y=﹣5
x+y=3-5=﹣2.
收起