Find the radius of the circle `(x-5)(x-1)+(y-7)(y-4)=0` .

Find the centre and the radius of the circle. 2x^2+2y^2-4x+8y-4=0

Find'the centre and radius of the circle (i) x^(2) +y^(2) + 4x - 1 = 0 (ii) 2 x^(2) + 2y^(2) = 3x - 5y + 7

Find the centre and radius of the circle 3x^(2)+(a+1)y^(2)+6x-9y+a+4=0 .

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

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

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

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