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If (P(x)=(x^2-3)(x^2+3)-x^4), what is the degree of (P(x))?

Answer and explanation

Correct answer: \(0\)

Using the identity \((a-b)(a+b)=a^2-b^2\), we get \((x^2-3)(x^2+3)=x^4-9\). Therefore, \(P(x)=x^4-9-x^4=-9\). Since \(-9\) is a non-zero constant polynomial, its degree is \(0\). The degree would be \(4\) only if the \(x^4\) terms did not cancel. Exam tip: simplify the polynomial first, then identify the highest power with a non-zero coefficient.

Related tags

PolynomialsDegree Of PolynomialAlgebraic IdentitiesConstant PolynomialSimplificationDegree Of A PolynomialIntroduction To PolynomialsMathematics

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