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If (A(x)=x^5+4) and (B(x)=-x^5+3x^2), what is the degree of (A(x)+B(x))?

Answer and explanation

Correct answer: 2

\(A(x)+B(x)=(x^5+4)+(-x^5+3x^2)=3x^2+4\). The terms \(x^5\) and \(-x^5\) cancel each other. The highest exponent in the remaining polynomial is \(2\), so its degree is \(2\). Choosing \(5\) would be incorrect because no \(x^5\) term remains after addition. Exam tip: find the degree only after simplifying the resulting polynomial.

Related tags

PolynomialsDegree Of PolynomialPolynomial AdditionCancellation Of TermsClass 9 MathematicsDegree Of A PolynomialIntroduction To PolynomialsMathematics

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