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Is \(-\frac{5}{6}x^2+x-8\) a polynomial?

Answer and explanation

Correct answer: Yes, because its coefficients are real and the powers of \(x\) are non-negative integers

Yes, \(-\frac{5}{6}x^2+x-8\) is a polynomial. Its coefficients may be any real numbers, so a negative fractional coefficient such as \(-\frac{5}{6}\) is allowed. The exponents of \(x\) are \(2\), \(1\), and \(0\), all of which are non-negative integers. Option B is incorrect because a fractional coefficient does not make an expression non-polynomial. Exam tip: identify a polynomial by checking that every variable exponent is a non-negative integer.

Related tags

PolynomialsDefinition Of PolynomialReal CoefficientsNon-Negative ExponentsAlgebraClass 9Definition Of A PolynomialIntroduction To Polynomials

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