A.\({\left( {x - 2} \right)^2} + {\left( {y - 2} \right)^2} = 4\), \({\left( {x - 10} \right)^2} + {\left( {y - 10} \right)^2} = 100\)
B.\({\left( {x + 2} \right)^2} + {\left( {y + 2} \right)^2} = 4\), \({\left( {x - 10} \right)^2} + {\left( {y - 10} \right)^2} = 100\)
C.\({\left( {x - 2} \right)^2} + {\left( {y - 2} \right)^2} = 4\), \({\left( {x + 10} \right)^2} + {\left( {y + 10} \right)^2} = 100\)
D.\({\left( {x + 2} \right)^2} + {\left( {y + 2} \right)^2} = 4\), \({\left( {x + 10} \right)^2} + {\left( {y + 10} \right)^2} = 100\)

A.\(0\)
B.\(1\)
C.\(2\)
D.\(3\)

A.\(0\)
B.\(1\)
C.\(2\)
D.\(3\)

A.\(\left( C \right):{x^2} + {\left( {y + 10} \right)^2} = 49\)
B.\(\left( C \right):{\left( {x + 10} \right)^2} + {y^2} = 49\)
C.\(\left( C \right):{x^2} + {\left( {y - 10} \right)^2} = 49\)
D.\(\left( C \right):{\left( {x - 10} \right)^2} + {y^2} = 49\)

A.\({x^2} + {y^2} + 8x + 6y + 12 = 0\)
B.\({x^2} + {y^2} - 8x - 6y + 12 = 0\)
C.\({x^2} + {y^2} - 8x - 6y - 12 = 0\)
D.\({x^2} + {y^2} + 8x + 6y - 12 = 0\)

A.\({\left( {x + 1} \right)^2} + {\left( {y - 2} \right)^2} = 25\)
B.\({\left( {x + 1} \right)^2} + {\left( {y - 2} \right)^2} = 5\)
C.\({\left( {x - 1} \right)^2} + {\left( {y + 2} \right)^2} = 25\)
D.\({\left( {x - 1} \right)^2} + {\left( {y + 2} \right)^2} = 5\)

A.\({\left( {x + 2} \right)^2} + {\left( {y + 2} \right)^2} = 1\)
B.\({\left( {x + 2} \right)^2} + {\left( {y + 2} \right)^2} = 2\)
C.\({\left( {x + 2} \right)^2} + {\left( {y + 2} \right)^2} = 4\)
D.\({\left( {x + 2} \right)^2} + {\left( {y + 2} \right)^2} = 3\)

A.Đường tròn tâm \(I\left( {4;\,\,0} \right)\), bán kính \(R = 1.\)
B.Đường tròn tâm \(I\left( { - 4;\,\,0} \right)\), bán kính \(R = 1.\)
C.Đường tròn tâm \(I\left( {0;\,\,4} \right)\), bán kính \(R = 1.\)              
D.Đường tròn tâm \(I\left( {0;\,\, - 4} \right)\), bán kính \(R = 1.\)

A.\(m \in \left( { - \infty ;\,\, - 1} \right) \cup \left( {\dfrac{3}{5};\,\, + \infty } \right)\)
B.\(m \in \left( { - \dfrac{3}{5};\,\,1} \right)\)
C.\(m \in \left[ { - \dfrac{3}{5};\,\,1} \right]\)
D.\(m \in \left( { - \infty ;\,\, - \dfrac{3}{5}} \right) \cup \left( {1;\,\, + \infty } \right)\)

A.một đường thẳng.
B.một đường tròn.
C.một điểm.
D.một đường parabol.