" The coordinate of centre of circle whose equation is "x^(2)+y^(2)-4x+6y-12=0

Find the coordinates of the centre and the radius of the circles whose equations are 4x^(2)+4y^(2)-16x-12y+21=0

If one of the diameters of the circle,given by the equation,x^(2)+y^(2)-4x+6y-12=0 is a chord of a circle S,whose centre is at (-3,2), then the radius of s is :

If one of the diameter of the circle, given by the equation x^(2)+y^(2)+4x+6y-12=0 , is a chord of a circle S, whose centre is (2,-3), the radius of S is

If one of the diameters of the circle, given by the equation x^(2)+y^(2)+4x+6y-12=0 , is a chord of a circle S , whose centre is (2,-3) , the radius of S is

In one of the diameters of the circle, given by the equation x^(2) + y^(2) - 4x + 6y - 12 = 0 , is a chord of a circle S , whose center is at (-3 , 2) , then the radius of S is

If one of the diameter of the circle , given by the equation , x^(2) + y^(2) - 4x + 6y - 12 = 0 , is a chord of a circle S , where centre is at (-3,2) , then the radius of S is

If one of the diameters of the circle, given by the equation x ^(2) + y^(2) + 4x + 6y -12 =0, is a chord of a circle S, whose centre is (2,-3), the radius of S is

If one of the diameters of the circle, given by the equation x ^(2) + y^(2) + 4x + 6y -12 =0, is a chord of a circle S, whose centre is (1,-3), the radius of S is

If one of the diameters of the circle, given by the equation, x^2+y^2-4x+6y-12=0 , is a chord of a circle S, whose centre is at (-3,2), then the radius of S is