If a circle is concentric with the circle `x^(2) + y^(2) = 8 ` and its diameter is 4 units , which of the following will be the equation of the circle ?

A circle is concentric with the circle x^(2) + y^(2) = 8 and its radius is 4 unit, state which of the following will be the equation of the circle ?

Equation of unit circle concentric with circle x^(2)+y^(2)+8x+4y-8=0 is

(i) Find the equation of a circle , which is concentric with the circle x^(2) + y^(2) - 6x + 12y + 15 = 0 and of double its radius. (ii) Find the equation of a circle , which is concentric with the circle x^(2) + y^(2) - 2x - 4y + 1 = 0 and whose radius is 5. (iii) Find the equation of the cricle concentric with x^(2) + y^(2) - 4x - 6y - 3 = 0 and which touches the y-axis. (iv) find the equation of a circle passing through the centre of the circle x^(2) + y^(2) + 8x + 10y - 7 = 0 and concentric with the circle 2x^(2) + 2y^(2) - 8x - 12y - 9 = 0 . (v) Find the equation of the circle concentric with the circle x^(2) + y^(2) + 4x - 8y - 6 = 0 and having radius double of its radius.

If a circle is concentric with the circle x^(2)+y^(2)-4x-6y+9=0 and passes through the point (-4,-5) then its equation is

If a circle is concentric with the circle x^(2)+y^(2)-4x-6y+9=0 and passes through the point (-4,-5) then its equation is

If a circle is concentric with the circle x^(2)+y^(2)-4x-6y+9=0 and passes through the point (-4,-5) then its equation is

If a circle is concentric with the circle x^(2)+y^(2)-4x-6y+9=0 and passes through the point (-4,-5) then its equation is

A circle is concentric with the circle x^(2) + y^(2) - 6x + 12y + 15 = 0 and has area double of its area. Its equation is

A circle is concentric with the circle x^2+y^2-6x+12y+15=0 and has area double of its area. The equation of the circle is