Quartic polynomial is a type of polynomial equation. Polynomial equations are algebraic expressions. Each polynomial expression may consist of variables, exponents and constants. These variables, exponents and constants are related by addition, subtraction, multiplication and division. There are certain restrictions in a polynomial. The restrictions include if there is a fraction, and then no variable can be present as the denominator. There cannot be any negative exponent as exponent may incluse $0,\ 1,\ 2,\ 3$ ...etc. Number of terms in a polynomial could be infinite. When the highest power of the variable in a polynomial equation is $4$, it is known as the quartic polynomial.