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Subjects
Class 10MathematicsPolynomialsPolynomials in one variableHardLevel 47
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If p(x)=x^3+x^2+x+1, what is the value of p(-1)?

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Answer and explanation

Correct answer: 0

Substituting -1 for x gives p(-1)=(-1)^3+(-1)^2+(-1)+1=-1+1-1+1=0. Therefore, option B is correct. Exam tip: always use parentheses when substituting a negative number, because ignoring them can cause a sign error and lead to an answer such as -2.

Related tags

PolynomialsEvaluation Of PolynomialsCubic PolynomialSubstitutionPolynomials In One Variable

Frequently asked questions

What is the correct answer to this question?

0

Why is this the correct answer?

Substituting -1 for x gives p(-1)=(-1)^3+(-1)^2+(-1)+1=-1+1-1+1=0. Therefore, option B is correct. Exam tip: always use parentheses when substituting a negative number, because ignoring them can cause a sign error and lead to an answer such as -2.

Which subject and chapter does this question cover?

This is a Class 10 Mathematics question. Chapter: Polynomials. Topic: Polynomials in one variable.

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