what is meant bydegenerated conic?

Degenerated conic:

When the section of a double-napped right circular cone intersects with a plane a conic section is formed. The different conic sections depend on the position of the intersecting plane with respect to the double–napped cone and the angle made as shown fig.

A degenerate conic is a conic that cannot be fitted to an irreducible curve. That is the eqn is quadratic form factorable as the product of two linear polynomials or else the polynomial cannot be reduced.

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