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If (A(x)=x^6+2) and (B(x)=-x^6+4x^3), what is the degree of (A(x)+B(x))?

Answer and explanation

Correct answer: 3

\(A(x)+B(x)=(x^6+2)+(-x^6+4x^3)=4x^3+2\). The \(x^6\) terms cancel each other. The highest exponent in the resulting polynomial is 3, so its degree is 3. Option 6 is incorrect because no \(x^6\) term remains after addition. Exam tip: Find the degree only after simplifying the sum and identifying the highest power with a non-zero coefficient.

Related tags

PolynomialsDegree Of PolynomialAddition Of PolynomialsLike TermsCancellationDegree Of A PolynomialIntroduction To PolynomialsMathematics

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