For 10 points, name this type of mathematical expression, exemplified by quadratics such as x squared plus 3x minus 5.
Eisenstein's criterion tells if certain types of these are irreducible over the rational numbers. If they involve only one variable, these objects will have at most n1 ["n minus 1"] extrema and n2 ["n minus 2"] inflection points if they are of degree n. One over x is (*) not this type of expression, because the exponent on the variable must be a positive integer. For 10 points, name this type of mathematical expression, exemplified by quadratics such as x squared plus 3x minus 5.
Eisenstein's criterion tells if certain types of these are irreducible over the rational numbers.
polynomials (accept polynomial expressions, equations, or functions; accept polynomials with integer coefficients; prompt on expressions, equations, or functions)