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After simplifying (x^2(x^3+1)-x^5+4x), what is the degree?

Answer and explanation

Correct answer: 2

On simplifying, \(x^2(x^3+1)-x^5+4x=x^5+x^2-x^5+4x=x^2+4x\). The terms \(x^5\) and \(-x^5\) cancel each other. The highest power of the variable in the remaining polynomial \(x^2+4x\) is 2, so its degree is 2. Choosing 5 would ignore the cancellation of like terms. Exam tip: Always simplify a polynomial completely before finding its degree.

Related tags

PolynomialsDegree Of PolynomialAlgebraic SimplificationLike TermsCancellationDegree Of A PolynomialIntroduction To PolynomialsMathematics

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