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Which expression is a polynomial whose degree is greater than (3)?

Answer and explanation

Correct answer: \(x^6-2x^2+9\)

In \(x^6-2x^2+9\), the highest power of \(x\) is \(6\), so its degree is \(6\), which is greater than \(3\). \(2x^3+1\) has degree \(3\), and \(5x-4\) has degree \(1\). \(\frac{1}{x}+6=x^{-1}+6\) is not a polynomial because it contains a negative power of \(x\). Exam tip: Find a polynomial's degree by identifying the greatest non-negative integer power of its variable.

Related tags

PolynomialsDegree Of PolynomialAlgebraClass 9 MathematicsPolynomial ExpressionsDegree Of A PolynomialIntroduction To PolynomialsMathematics

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