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If (p(x)=14-7x), what is its zero?
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Answer and explanation
Correct answer: \(2\)
To find the zero, set \(p(x)=0\): \(14-7x=0\). Thus, \(7x=14\), so \(x=2\). Substituting \(-2\) gives \(14-7(-2)=28\), not zero. Exam tip: verify a zero by substituting it into the polynomial; the result must be \(0\).
Frequently asked questions
What is the correct answer to this question?
\(2\)
Why is this the correct answer?
To find the zero, set \(p(x)=0\): \(14-7x=0\). Thus, \(7x=14\), so \(x=2\). Substituting \(-2\) gives \(14-7(-2)=28\), not zero. Exam tip: verify a zero by substituting it into the polynomial; the result must be \(0\).
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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