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Which expression is a polynomial with a negative constant term?

Answer and explanation

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

A polynomial in \\(x\\) may have positive, zero, or negative coefficients. The sign of a coefficient does not decide whether an expression is a polynomial. What matters is that the powers of \\(x\\) are non-negative whole numbers. In \\(x^2+3x-8\\), the powers are \\(2\\), \\(1\\), and \\(0\\), so every term is permitted, and the constant term is -8.

Therefore, option A is the required expression. The other choices contain \\(x^{-2}\\), \\(\\sqrt{x}=x^{1/2}\\), or \\(1/x=x^{-1}\\). These involve a negative or fractional power and therefore are not polynomials in \\(x\\), even though each also includes the negative constant -8. A negative constant is entirely acceptable in a polynomial.

Related tags

Definition-PolynomialNegative-ConstantValid-Polynomial

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