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If (p(x)=(x^7-5x^4+2)-(x^7-2x^4)), what is the degree of (p(x))?

Answer and explanation

Correct answer: \(4\)

On removing the brackets, every term of the second expression changes sign: \(p(x)=x^7-5x^4+2-x^7+2x^4=-3x^4+2\). The \(x^7\) terms cancel, and the highest power in the remaining polynomial is \(4\); hence its degree is \(4\). Although \(7\) appears in the original expressions, its term does not remain after simplification. Exam tip: always simplify a polynomial completely before finding its degree.

Related tags

PolynomialsDegree Of PolynomialPolynomial SubtractionLike TermsAlgebraic SimplificationDegree Of A PolynomialIntroduction To PolynomialsMathematics

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