Answer:
Circle
Explanation:
The center-radius form of the circle equation is in the format (x – h)² + (y – k)²= r². with the center being at the point (h, k) and the radius being "r". This form of the equation is helpful, since you can easily find the center and the radius.
A circle is a set of points in the plane.
So the conix section with this 4x2 + 4(y2 - 4) = 0 is definitely a circle.