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Is (1/2)x² − 7 a polynomial?

Answer and explanation

Correct answer: Yes, because a coefficient may be a fraction

The governing concept is that polynomial restrictions apply to the exponents of the variable, not to whether coefficients must be integers. In (1/2)x² − 7, the exponent of x in the first term is 2, and the constant term −7 can be regarded as having x-power 0. Both 2 and 0 are non-negative integers, so the expression is a polynomial, specifically a quadratic polynomial. The coefficient 1/2 is a perfectly valid numerical coefficient and does not prevent polynomial form. Therefore option A is correct. Option B incorrectly rejects fractional coefficients. Option C is wrong because constant terms are allowed, and option D is wrong because x² is an ordinary permitted polynomial term.

Related tags

Polynomial DefinitionCoefficientsQuadratic PolynomialIntroduction To PolynomialsClass 9 MathematicsDefinition Of A PolynomialMathematicsClass 9 Mcq

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