Question

defination of cubic polynomial

Answer 1

A cubic polynomial is a polynomial of degree 3. A univariate cubic polynomial has the form . An equation involving a cubic polynomial is called a cubic equation. A closed-form solution known as the cubic formula exists for the solutions of an arbitrary cubic equation.

Answer 2

Hello dear,
The defination of Cubic polynomial is, 

A cubic polynomial is a polynomial of degree 3. A equation involving the cubic polynomial is called cubic equation

Thank you..