Answer:
Point-circle
Explanation:
The equation x^2 + y^2 = 0 represents a point circle.
To see why, note that any point (x, y) that satisfies this equation must have x^2 = 0 and y^2 = 0, since the sum of two non-negative numbers is zero only when both are zero. This implies that x = 0 and y = 0, so the only point that satisfies the equation is the origin (0, 0).
Therefore, the equation x^2 + y^2 = 0 represents a circle with radius zero, which is a point circle at the origin. The appropriate description for the equation is a point circle.