7x^(2)+y^(2)-4x-8y-45=0

In each the following find the centre and radius of circles. x^(2)+y^(2)-4x-8y-45=0 .

In each the following find the centre and radius of circles. x^(2)+y^(2)-4x-8y-45=0 .

Find the centre and radius of the circles x^(2)+y^(2)-4x-8y-45,=0

In each the following find the centre and radius of circles. x^(2)+y^(2)-4x-8y-45=0 .

Find the centre and radius of the circle x^(2)+y^(2)-4x-8y-45=0 ?

In each the following find the centre and radius of circles. x^(2)+y^(2)-4x-8y-45=0 .

Find the centre and radius of circles. x^(2)+y^(2)-4x-8y-45=0 .

The centre of circle cutting the three circles x^(2)+y^(2)-4x-4y+5=0 , x^(2)+y^(2)-4x-6y+5=0 , x^(2)+y^(2)-4x-8y+5=0 orthogonally is

If the equation of a circle is: x^2 + y^2-4x-8y -45 =0 , then its centre is :

Find the equation of radical axis of the circles x^(2)+y^(2)-3x+5y-7=0 and 2x^(2)+2y^(2)-4x+8y-13=0 .