We will now restrict our discussion to polynomials in one variable. For any polynomial expression, the zeroes are those values of the variable for which the polynomial as a whole has zero value. Since we are restricted to the set of Reals, we will always consider zeroes which have real values. This means that even though a polynomial may have zeroes which are complex-valued, we will not be considering them. The following table shows some polynomial expressions and their zeroes:
We note that some polynomials may have no (real-valued) zeroes.