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Which expression is a polynomial of degree (6)?

Answer and explanation

Correct answer: \(2x^6-x^3+8\)

In \(2x^6-x^3+8\), the powers of \(x\) are \(6\), \(3\), and \(0\), all of which are non-negative integers. The highest exponent is \(6\), so it is a polynomial of degree \(6\). In option A, \(x^{6/2}=x^3\), so its degree is \(3\); options B and D contain negative powers of \(x\), so they are not polynomials. Exam tip: before finding a polynomial’s degree, check that no variable has a negative or fractional exponent.

Related tags

PolynomialsDegree Of PolynomialExponentsClass 9 MathematicsAlgebraDegree Of A PolynomialIntroduction To PolynomialsMathematics

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