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Determine if the expression is rational. If not, explain why.
Rational expression. 0 is a polynomial, and is allowed on the top. Remember, he's not a total outcast. He's just on restricted access.
Not a rational expression. The numerator has the term 9x, so it is not a polynomial.
Rational expression. is a constant polynomial.
Not a rational expression. The denominator is equivalent to 0. We knew he'd try to get away with that.
Determine if the expression x is rational. If not, explain why.
Rational expression, since . x and 1 are both polynomials.