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Which value gives (0) for the polynomial (p(x)=x^3-3x^2+3x-1)?

Answer and explanation

Correct answer: (1)

The direct answer is option B, 1. Recognize the identity \(x^3-3x^2+3x-1=(x-1)^3\). A zero of a polynomial is an input that makes its value 0. Therefore \((x-1)^3=0\) gives \(x-1=0\), so \(x=1\). Direct substitution confirms it: \(p(1)=1^3-3(1)^2+3(1)-1=1-3+3-1=0\). Option A, 0, gives \(-1\), not 0. Option B is correct. Option C, 2, gives \(8-12+6-1=1\), so it is not a zero. Option D, 3, gives \(27-27+9-1=8\), also not zero. The polynomial is a perfect cube, so recognizing the binomial pattern is quickest. Memory cue: \(a^3-3a^2+3a-1=(a-1)^3\).

Related tags

ZeroCubic PolynomialEvaluation

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