Beginning Algebra
All variable exponents are positive whole numbers (1, 2, 3, ...), and constants are allowed as degree zero terms
All variable exponents in the expression are considered nonnegative integers (0, 1, 2, 3, ...)
An expression is a polynomial if it has at most three terms separated by addition or subtraction signs
An expression is a polynomial as long as the coefficients are integers and there are no fractional coefficients in front of the variables