Multiple choice The equation of the circle with centre ( 1,2 ) and tangent $ x + y - 5 = 0 $ is $x ^ { 2 } + y ^ { 2 } + 2 x - 4 y + 6 = 0$ $x ^ { 2 } + y ^ { 2 } - 2 x - 4 y + 3 = 0$ $x ^ { 2 } + y ^ { 2 } - 2 x + 4 y + 8 = 0$ $x ^ { 2 } + y ^ { 2 } - 2 x - 4 y + 8 = 0$ Reveal answer Fill a bubble to check yourself A Correct answer