x눀+y눀-6x+10y+34=0,则x+y的值是什么

快点啊
2024-12-16 01:20:45
推荐回答(2个)
回答1:

解:﹙x²-6x+9﹚+﹙y²+10y+25﹚=0
﹙x-3﹚²+﹙y+5﹚岁神²=0
∵ ﹙x-3﹚²≥型雀搭0, ﹙y+5﹚卜拿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.

回答2:

(x -3)^2 + (y+5)^2 = 0
x =3 y = -5
x+y = -2