求下列各圆的圆心坐标和半径长﹙1﹚x²+y²-2x-5=0﹙2﹚x²+y²+2x-4y-4=0﹙3﹚x²+y²+2ax=0(4)x²+y²-2by-2b²=0 急求,各位帮帮忙
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![求下列各圆的圆心坐标和半径长﹙1﹚x²+y²-2x-5=0﹙2﹚x²+y²+2x-4y-4=0﹙3﹚x²+y²+2ax=0(4)x²+y²-2by-2b²=0 急求,各位帮帮忙](/uploads/image/z/11524181-5-1.jpg?t=%E6%B1%82%E4%B8%8B%E5%88%97%E5%90%84%E5%9C%86%E7%9A%84%E5%9C%86%E5%BF%83%E5%9D%90%E6%A0%87%E5%92%8C%E5%8D%8A%E5%BE%84%E9%95%BF%EF%B9%991%EF%B9%9Ax%26%23178%3B%2By%26%23178%3B%EF%BC%8D2x%EF%BC%8D5%3D0%EF%B9%992%EF%B9%9Ax%26%23178%3B%EF%BC%8By%26%23178%3B%EF%BC%8B2x%EF%BC%8D4y%EF%BC%8D4%3D0%EF%B9%993%EF%B9%9Ax%26%23178%3B%EF%BC%8By%26%23178%3B%EF%BC%8B2ax%3D0%284%29x%26%23178%3B%EF%BC%8By%26%23178%3B%EF%BC%8D2by%EF%BC%8D2b%26%23178%3B%3D0+%E6%80%A5%E6%B1%82%2C%E5%90%84%E4%BD%8D%E5%B8%AE%E5%B8%AE%E5%BF%99)
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求下列各圆的圆心坐标和半径长﹙1﹚x²+y²-2x-5=0﹙2﹚x²+y²+2x-4y-4=0﹙3﹚x²+y²+2ax=0(4)x²+y²-2by-2b²=0 急求,各位帮帮忙
求下列各圆的圆心坐标和半径长
﹙1﹚x²+y²-2x-5=0
﹙2﹚x²+y²+2x-4y-4=0
﹙3﹚x²+y²+2ax=0
(4)x²+y²-2by-2b²=0
急求,各位帮帮忙
求下列各圆的圆心坐标和半径长﹙1﹚x²+y²-2x-5=0﹙2﹚x²+y²+2x-4y-4=0﹙3﹚x²+y²+2ax=0(4)x²+y²-2by-2b²=0 急求,各位帮帮忙
求圆心坐标和半径只需要将圆的一般式方程转化为标准方程即可(即对X,Y 进行配方)
如第一个可配方成(X-1)^2+Y^2=6, 因此圆心是(1,0),半径是根号6