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A student says that the degree of the polynomial \(R(x)=(3x^6-2x^4)+(5x^4-3x^6)+7x^2\) is 6 because an \(x^6\) term is visible in it. What is the correct evaluation of the statement?

Answer and explanation

Correct answer: The statement is incorrect; after simplification, the \(x^6\) terms cancel and the degree is 4.

Combining like terms gives \(3x^6-3x^6=0\) and \(-2x^4+5x^4=3x^4\). Thus, \(R(x)=3x^4+7x^2\), whose highest exponent is 4. In exams, always simplify before finding degree.

Related tags

PolynomialsDegree Of PolynomialLike TermsSimplificationAlgebraClass 9 MathematicsDegree Of A PolynomialIntroduction To Polynomials

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