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If (p(x)=(a-3)x^6+2x^2-1) and (a=3), what is the degree of (p(x))?

Answer and explanation

Correct answer: 2

Substituting \(a=3\) gives \(a-3=0\). Hence, the \(x^6\) term vanishes and the polynomial becomes \(p(x)=2x^2-1\). The highest power of \(x\) is \(2\), so its degree is \(2\). Option 6 is incorrect because a term with zero coefficient is not part of the polynomial. Exam tip: Substitute any given parameter values and remove zero-coefficient terms before finding the degree.

Related tags

PolynomialsDegree Of PolynomialParameter SubstitutionAlgebraClass 9 MathematicsDegree Of A PolynomialIntroduction To PolynomialsMathematics

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