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Which statement is correct about (3x^2+\frac{2}{5}x-1)?

Answer and explanation

Correct answer: It is a polynomial because powers are non-negative integers

For a polynomial in x, each power of x must be a non-negative integer. The coefficients can be integers, fractions, or other allowed numbers; they do not need to be whole numbers. Also, a constant term is permitted, because it can be written as a coefficient multiplied by \\(x^0\\). These rules should be checked term by term.

In \\(3x^2+\frac{2}{5}x-1\\), the powers are 2, 1, and 0. All three are non-negative integers. The fraction \\(\frac{2}{5}\\) is only the coefficient of x, so it causes no problem, and the term \\(-1\\) is a valid constant term. Hence option B correctly states that the expression is a polynomial.

Related tags

Definition-PolynomialFractional-CoefficientValid-Polynomial

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