A polynomial is one of the most widely used functions in algebra. It is the product of constants (coefficients) and variables raised to powers (terms). Finding the roots is often referred to as “finding the zeros of a polynomial.”
An nth degree polynomial will have precisely n zeros. If f is a polynomial function of degree n > 0, then f has at least one zero in the complex number system. Remember that a polynomial function will have n zeros, they may be real or complex, and they may be repeated.
On the HP 48G calculator, the first results will be the complex (imaginary) numbers.