If (p(x)=9-4x), what is the value of (p(2))?
Answer and explanation
Correct answer: 1
Given \(p(x)=9-4x\). Substituting \(x=2\), we get \(p(2)=9-4(2)=9-8=1\). Hence, the correct answer is 1. The value 5 would be obtained for \(x=1\), not for \(x=2\). Exam tip: To find the value of a polynomial, substitute the given value for every \(x\), then perform multiplication before addition or subtraction.
Frequently asked questions
What is the correct answer to this question?
1
Why is this the correct answer?
Given \(p(x)=9-4x\). Substituting \(x=2\), we get \(p(2)=9-4(2)=9-8=1\). Hence, the correct answer is 1. The value 5 would be obtained for \(x=1\), not for \(x=2\). Exam tip: To find the value of a polynomial, substitute the given value for every \(x\), then perform multiplication before addition or subtraction.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Introduction to Polynomials. Topic: Linear polynomials.
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