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Which expression is a polynomial because √13 is only a coefficient?

Answer and explanation

Correct answer: √13x² − 4x + 1

Option A is correct. In √13x² − 4x + 1, √13 is a constant coefficient multiplying x²; it is not an exponent and x is not inside the radical. The powers of x are 2, 1, and 0, all of which are non-negative integers. Polynomial coefficients may be irrational real numbers, so the fact that √13 is irrational does not disqualify the expression. In option B, √x equals x^(1/2), giving a fractional exponent. In option C, x^(-2) has a negative exponent. In option D, √13/x can be written as √13x^(-1), so x has a negative exponent. Therefore only option A meets the power condition required for a polynomial.

Related tags

Irrational-CoefficientDefinition-Of-PolynomialValid-PolynomialDefinition Of A PolynomialIntroduction To PolynomialsMathematicsClass 9 Mcq

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