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Class 10 Mathematics Polynomials Polynomials in one variableEasyLevel 48

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If p(x)=x^2-1, what is the value of p(-1)?

Answer and explanation

Correct answer: 0

Substitute x=-1 into the polynomial: p(-1)=(-1)^2-1=1-1=0. Hence, the correct answer is 0. The distractor -2 results from incorrectly treating (-1)^2 as -1. In an exam, use brackets around a negative value before squaring: (-1)^2=1.

Related tags

Polynomials Polynomial Functions Substitution Zeros

Frequently asked questions

What is the correct answer to this question?

0

Why is this the correct answer?

Substitute x=-1 into the polynomial: p(-1)=(-1)^2-1=1-1=0. Hence, the correct answer is 0. The distractor -2 results from incorrectly treating (-1)^2 as -1. In an exam, use brackets around a negative value before squaring: (-1)^2=1.

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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