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Which expression is a polynomial in x if k is treated as a constant?

Answer and explanation

Correct answer: kx³ − 2x + 8

When k is treated as a constant, it can serve as a coefficient. In option A, the powers of x are 3, 1, and 0, all non-negative integers, so kx³ − 2x + 8 is a polynomial in x. The other expressions contain x in a denominator, a negative power, or a square-root power, which are not allowed in a polynomial in x.

Related tags

PolynomialParameterConstantValid-ExponentsDefinition Of A PolynomialIntroduction To PolynomialsMathematicsClass 9 Mcq

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