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Why is \(x^{\frac{5}{2}}-1\) not a polynomial?

Answer and explanation

Correct answer: Because the exponent of the variable is fractional

In a polynomial, every variable exponent must be a non-negative integer. Here, the exponent of \(x\) is \(\frac{5}{2}\), which is fractional, so \(x^{\frac{5}{2}}-1\) is not a polynomial. A subtraction sign, a negative constant term, or two terms does not make an expression non-polynomial. Exam tip: check that each variable exponent is 0 or a positive integer.

Related tags

PolynomialsFractional ExponentsNon-PolynomialAlgebraClass 9Definition Of A PolynomialIntroduction To PolynomialsMathematics

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