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A student says that 7x³ - 5/x + 2 is a polynomial of degree 3. Which term causes an error in the student's conclusion?

Answer and explanation

Correct answer: -5/x

The term -5/x can be written as \(-5x^{-1}\). Since x has a negative exponent, the expression is not a polynomial, so it cannot have degree 3. Exam tip: check exponents before finding degree.

Related tags

PolynomialsDegree Of PolynomialNegative ExponentsMisconceptionAlgebraClass 9Degree Of A PolynomialIntroduction To Polynomials

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