{"trustable":false,"sections":[{"title":"","value":{"format":"MD","content":"zjh捡到了3个点,他想用这三个点围成一个⚪,给出这三个点的笛卡尔坐标,用这两种表达式,保证不在同一条直线上。\n(x - h)^2 + (y - k)^2 \u003d r^2 h,k,r为常数\n\nx^2 + y^2 + ax + by - z \u003d 0 a,b,z为常数"}},{"title":"Input","value":{"format":"MD","content":"多组数据。\n每行三个点,坐标为实数 -10^9\u003c坐标\u003c10^9"}},{"title":"Output","value":{"format":"MD","content":"两种表达式"}},{"title":"Sample Input","value":{"format":"MD","content":"7.0 -5.0 -1.0 1.0 0.0 -6.0\n1.0 7.0 8.0 6.0 7.0 -2.0\n"}},{"title":"Sample Output","value":{"format":"MD","content":"(x - 3.000)^2 + (y + 2.000)^2 \u003d 5.000^2\nx^2 + y^2 - 6.000x + 4.000y - 12.000 \u003d 0\n\n(x - 3.921)^2 + (y - 2.447)^2 \u003d 5.409^2\nx^2 + y^2 - 7.842x - 4.895y - 7.895 \u003d 0\n"}}]}