Find the centre and radius of each of the following circle: `x^2+y^2-x+2y-3=0`

Find the centre and radius of each of the following circle: x^(2)+y^(2)-4x+6y=5

Find the coordinates of the centre and radius of each of the following circle: x^(2)+y^(2)-ax-by=0

Find the centre and radius of each of the following circle: (x-1)^(2)+y^(2)=4

Find the coordinates of the centre and radius of each of the following circle: x^(2)+y^(2)+6x-8y-24=0

Find the coordinates of the centre and radius of each of the following circle: 2x^(2)+2y^(2)-3x+5y=7

Find the centre and radius of each of the following circle: (x+5)^(2)+(y+1)^(2)=9

Find the centre and radius of each of the following circles : (i) (x - 3)^(2) + (y- 1) ^(2) = 9 (ii) (x - (1)/(2) ) ^(2) + ( y + (1)/(3) ) ^(2) = (1)/(16) (iii) (x + 5) ^(2) + ( y- 3 ) ^(2) = 20 (iv) x ^(2) + (y- 1 ) ^(2) = 2

Find the centre and radius of each of that circles : x^2 +y^2 -4x + 6y=5

Find the centre and radius of each of the following (i)x^(2)+y^(2)+4x-4y+1=0