👉 An ellipse is a curve in two-dimensional space that can be described by an equation of the form \(Ax^2 + Bxy + Cy^2 + Dx + Ey + F = 0\), where \(A\) ≠ 0, \(B^2 > A^2 - C^2\), and \(D^2 + E^2 < 4AC\). This shape is often used in geometry to represent circles or parabolas.