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A student says that if two polynomials have degree 6, then the degree of their sum will always be 6. If \(p(x)=x^6-3x^2\) and \(q(x)=-x^6+5x\), which conclusion is correct?

Answer and explanation

Correct answer: The sum has degree 2 because the \(x^6\) terms cancel.

\(p(x)+q(x)=(x^6-3x^2)+(-x^6+5x)=-3x^2+5x\). After the \(x^6\) terms cancel, the highest remaining exponent is 2, so the degree is 2. Exam tip: simplify like terms before finding degree.

Related tags

PolynomialsDegree Of PolynomialCancellation Of TermsAlgebraic ExpressionsClass 9 MathematicsMisconception AnalysisDegree Of A PolynomialIntroduction To Polynomials

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