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Which expression is a polynomial but not a linear polynomial?

Answer and explanation

Correct answer: \(x^2+1\)

\(x^2+1\) is a polynomial because the powers of \(x\) are non-negative integers. Its highest power is 2, so its degree is 2 and it is not a linear polynomial. \(4x-9\) is linear because its degree is 1. \(\frac{1}{x}+2\) and \(\sqrt{x}+1\) are not polynomials because they contain powers \(-1\) and \(\frac{1}{2}\), respectively. Exam tip: in a polynomial, the exponent of a variable must be a non-negative integer.

Related tags

PolynomialsLinear PolynomialsDegree Of PolynomialClassification Of PolynomialsClass 9 MathematicsIntroduction To PolynomialsMathematicsClass 9 Mcq

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