If (p(x)=8x-9), what is (p(2))?
Answer and explanation
Correct answer: 7
Given \(p(x)=8x-9\), substitute 2 for \(x\): \(p(2)=8\times2-9=16-9=7\). Hence, 7 is the correct answer. The value 16 is only \(8\times2\); subtracting 9 is still necessary. Exam tip: To evaluate a polynomial, replace every \(x\) with the given value and then simplify carefully.
Frequently asked questions
What is the correct answer to this question?
7
Why is this the correct answer?
Given \(p(x)=8x-9\), substitute 2 for \(x\): \(p(2)=8\times2-9=16-9=7\). Hence, 7 is the correct answer. The value 16 is only \(8\times2\); subtracting 9 is still necessary. Exam tip: To evaluate a polynomial, replace every \(x\) with the given value and then simplify carefully.
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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