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A student says that the degree of the polynomial \(7-4x^5+3x^2\) is 2 because the last term has exponent 2. What is the error in the student's statement?

Answer and explanation

Correct answer: The degree is the highest exponent of \(x\) in the polynomial, which is 5 here.

The degree of a polynomial is the greatest exponent of the variable in any of its terms; the order of the terms does not matter. Here, \(-4x^5\) contains \(x\) with exponent 5, so the polynomial has degree 5. Option D is incorrect because a negative coefficient does not change an exponent. Exam tip: check every term and choose the largest exponent of the variable.

Related tags

PolynomialsDegree Of PolynomialClass 9 MathematicsExponentsPolynomial DegreeCommon MisconceptionsDegree Of A PolynomialIntroduction To Polynomials

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