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Which expression is a quadratic binomial polynomial in x?

Answer and explanation

Correct answer: x^2 - 16

To classify the expression, check two features independently: its degree and its number of terms. A quadratic polynomial has degree 2, meaning the greatest exponent of x is 2. A binomial has exactly two non-zero terms after simplification. Option A, x² − 16, has two terms and greatest exponent 2, so it is a quadratic binomial polynomial. Option B also has degree 2 but has three terms, making it a trinomial. Option C has greatest exponent 3, so it is cubic, not quadratic. Option D contains x⁻², a negative exponent, and therefore is not a polynomial at all. Thus only option A satisfies both required conditions. The constant −16 counts as one term, with implicit power x⁰.

Related tags

Quadratic-PolynomialBinomialDegree-And-TermsIntroduction To PolynomialsMathematicsClass 9 McqDefinition Of A Polynomial

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