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What is the degree of ((x^4+3)^2-(x^8+6x^4))?

Answer and explanation

Correct answer: \(0\)

\((x^4+3)^2=x^8+6x^4+9\). On subtracting \((x^8+6x^4)\), the terms \(x^8\) and \(6x^4\) cancel, leaving only the non-zero constant polynomial \(9\). The degree of every non-zero constant polynomial is \(0\), so the correct answer is \(0\). Choosing \(8\) would result from ignoring the cancellation after subtraction. Exam tip: always simplify the complete expression before finding its degree.

Related tags

PolynomialsDegree Of PolynomialBinomial ExpansionTerm CancellationConstant PolynomialDegree Of A PolynomialIntroduction To PolynomialsMathematics

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