(1)y^(2)+x-20=0

From a point R(5,8), two tangents RPandRQ are drawn to a given circle S=0 whose radius is 5. If the circumcenter of triangle PQR is (2,3), then the equation of the circle S=0 is x^(2)+y^(2)+2x+4y-10=0x^(2)+y^(2)+x+2y-10=0x^(2)+y^(2)-x+2y-20=0x^(2)+y^(2)+4x-6y-12=0

The points of intersection of the line 4x-3y-10=0 and the circle x^(2)+y^(2)-2x+4y-20=0 are

The midpoint of a chord of the ellipse x^(2)+4y^(2)-2x+20y=0 is (2, -4). The equation of the chord is

The tangent of the circle x^(2)+y^(2)-2x-4y-20=0 at (1,7) meets the y -axis at the point

The sum of abscissa and ordinate of a point on the circle x^(2)+y^(2)-4x+2y-20=0 which is nearest to (2, (3)/(2)) is :

The sum of abscissa and ordinate of a point on the circle x^(2)+y^(2)-4x+2y-20=0 which is nearest to (2, (3)/(2)) is :

The loucs of the centre of the circle which cuts orthogonally the circle x^(2)+y^(2)-20x+4=0 and which touches x=2 is