Rational Expressions Exercises

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Yeah, it's a rational expression. Zero is a polynomial, and is allowed on the top. Remember, he's not a total outcast. He's just on restricted access.

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Not a rational expression. The numerator has the term 9^x, so it's not a polynomial.

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Ding ding ding, it's a rational expression: is a constant polynomial, and we can flip that x ^-5 down into the denominator as x⁵. That'll make the numerator and denominator both into standard-issue polynomials.

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Not a rational expression. The denominator is equivalent to 0. We knew he'd try to get away with that.

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Rational expression, since and we know x and 1 are both polynomials.