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If (h(x)=(x^6+x^3)^2-x^{12}-2x^9), what is the degree of (h(x))?

Answer and explanation

Correct answer: \(6\)

\((x^6+x^3)^2=x^{12}+2x^9+x^6\). Therefore, \(h(x)=x^{12}+2x^9+x^6-x^{12}-2x^9=x^6\). The highest exponent in the simplified polynomial is \(6\), so its degree is \(6\). The terms with exponents \(12\) and \(9\) cancel, so they do not determine the degree. Exam tip: simplify the expression and cancel like terms before finding the degree.

Related tags

PolynomialsDegree Of PolynomialBinomial ExpansionLike TermsCancellationClass 9 MathematicsDegree Of A PolynomialIntroduction To Polynomials

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