If the equation `lamdax^(2)+(2lamda-3)y^(2)-4x-1=0` represents a circle, then its radius is

If the equation lambda x^2+(2 lambda-3)y^2-4x-1=0 represents a circle, then its radius is :

If 2x^2+lambdaxy+2y^2 +(lambda-4)x + 6y-5=0 represents a circle, then its radius is:

If the equation kx^(2) + (2k - 3) y^(2) - 6x + 4y + 3 = 0 represents a circle, then its centre is

If the equation (4a-3)x^(2)+ay^(2)+6x-2y+2=0 represents a circle,then its centre is a.(3,-1) b.(3,1) c.(-3,1) d.none of these

Show that the equation 3x^(2)+3y^(2)+6x-4y-1=0 represents a circle Find its centre and radius.

Show that the equation x^(2)+y^(2)+x-y=0 represents a circle find its centre and radius.

If the equation (4a-3)x^2+a y^2+6x-2y+2=0 represents a circle, then its centre is a. (3,-1) b. (3,1) c. (-3,1) d. none of these

If x^(2)+y^2-4x+6y+c=0 represents a circle with radius 6 then c is

If the equation (4 lambda - 3) x^(2) + lambda y ^(2) + 6x - 2y + 2 = 0 represents a circle, then its centre is