When d ^ 2 + e ^ 2-4f > 0, the quadratic equation x ^ 2 + y ^ 2 + DX + ey + F > 0 is called the equation of circle Is that right?

When d ^ 2 + e ^ 2-4f > 0, the quadratic equation x ^ 2 + y ^ 2 + DX + ey + F > 0 is called the equation of circle Is that right?

Revise:
The first is: x ^ 2 + y ^ 2 + DX + ey + F = 0
When: D ^ 2 + e ^ 2-4f = 0, it is a point
When: D ^ 2 + e ^ 2-4f > 0, it is a circle equation