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Which of the following is a cubic polynomial?

Answer and explanation

Correct answer: \(x^3-4x+2\)

A cubic polynomial is a polynomial of degree 3. In \(x^3-4x+2\), the highest power of the variable \(x\) is 3, so it is a cubic polynomial. Option B has degree 2, option C has degree 1, and option D is a constant polynomial. Exam tip: Identify the degree of a polynomial by looking for the highest power of its variable.

Related tags

Cubic PolynomialDegree Of PolynomialPolynomials In One VariablePolynomial ClassificationDefinition Of A PolynomialIntroduction To PolynomialsMathematicsClass 9 Mcq

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