怎样把圆的一般方程配方 例如x^2+y^2-5x-y+4=0 要详细过程 谢谢!
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发布时间:2024-09-28 14:22
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热心网友
时间:2024-10-04 17:26
x^2+y^2-5x-y+4=0 ,
x²-5x+y²-y+4=0,
x²-2·(5/2)·x+(5/2)²+y²-2·(1/2)·y+(1/2)²=+(5/2)²+(1/2)²-4,
[x-(5/2)]²+[y-(1/2)]²=5/2,
答:圆心为点(5/2,1/2),半径为(√10)/2.
热心网友
时间:2024-10-04 17:31
x^2+y^2-5x-y+4=0
(x-5/2)^2+(y-1/2)^2-25/4-1/4+4=0
(x-5/2)^2+(y-1/2)^2=5/2
(x-5/2)^2+(y-1/2)^2=(√10/2)^2
圆心(5/2,1/2) 半径√10/2
(x-a)²+(y-b)²=r² 圆心(a,b) 半径r
热心网友
时间:2024-10-04 17:25
解:∵x^2+y^2-5x-y+4=0
x^2-2*(5/2)x+(5/2)^2+y^2-2*(1/2)y+(1/2)^2+4-(5/2)^2-(1/2)^2=0
[x-(5/2)]^2+[y-(1/2)]^2=5/2
[x-(5/2)]^2+[y-(1/2)]^2=[√(5/2)]^2
热心网友
时间:2024-10-04 17:26
主要观察完全平方的2倍项
x^2+y^2-5x-y+4=0
[x^2-2*5/2x+(5/2)^2]+[y^2-2*1/2y+(1/2)^2]-25/4-1/4+4=0
(x-5/2)^2+(y-1/2)^2=5/2
热心网友
时间:2024-10-04 17:32
(x^2-5x+25/4)-25/4+(y^2-y+1/4)-1/4+4=0
(x-5/2)^2-25/4+(y-1/2)^2-1/4+4=0
(x-5/2)^2+(y-1/2)^2=2.5
热心网友
时间:2024-10-04 17:27
直接写个0就行了
热心网友
时间:2024-10-04 17:24
x^2+y^2-5x-y+4=0 ,
x²-5x+y²-y+4=0,
x²-2·(5/2)·x+(5/2)²+y²-2·(1/2)·y+(1/2)²=+(5/2)²+(1/2)²-4,
[x-(5/2)]²+[y-(1/2)]²=5/2,
答:圆心为点(5/2,1/2),半径为(√10)/2.
热心网友
时间:2024-10-04 17:30
解:∵x^2+y^2-5x-y+4=0
x^2-2*(5/2)x+(5/2)^2+y^2-2*(1/2)y+(1/2)^2+4-(5/2)^2-(1/2)^2=0
[x-(5/2)]^2+[y-(1/2)]^2=5/2
[x-(5/2)]^2+[y-(1/2)]^2=[√(5/2)]^2
热心网友
时间:2024-10-04 17:25
主要观察完全平方的2倍项
x^2+y^2-5x-y+4=0
[x^2-2*5/2x+(5/2)^2]+[y^2-2*1/2y+(1/2)^2]-25/4-1/4+4=0
(x-5/2)^2+(y-1/2)^2=5/2
热心网友
时间:2024-10-04 17:26
直接写个0就行了
热心网友
时间:2024-10-04 17:31
(x^2-5x+25/4)-25/4+(y^2-y+1/4)-1/4+4=0
(x-5/2)^2-25/4+(y-1/2)^2-1/4+4=0
(x-5/2)^2+(y-1/2)^2=2.5
热心网友
时间:2024-10-04 17:28
x^2+y^2-5x-y+4=0
(x-5/2)^2+(y-1/2)^2-25/4-1/4+4=0
(x-5/2)^2+(y-1/2)^2=5/2
(x-5/2)^2+(y-1/2)^2=(√10/2)^2
圆心(5/2,1/2) 半径√10/2
(x-a)²+(y-b)²=r² 圆心(a,b) 半径r