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Which expression satisfies the definition of a polynomial?

Answer and explanation

Correct answer: \(x^2+4x+4\)

In \(x^2+4x+4\), the powers of \(x\) are \(2\), \(1\), and \(0\). All are non-negative integers, so it is a polynomial in \(x\). \(\sqrt{x}=x^{1/2}\) has a fractional exponent, while \(\frac{2}{x}=2x^{-1}\) and \(x^{-1}+5\) contain negative exponents; therefore, they are not polynomials. Exam tip: variable exponents in a polynomial can only be \(0,1,2,\ldots\).

Related tags

PolynomialsPolynomial DefinitionIdentify PolynomialsNon-Negative ExponentsClass 9 MathematicsDefinition Of A PolynomialIntroduction To PolynomialsMathematics

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