Which option has zero (-7) for a linear polynomial?
Answer and explanation
Correct answer: \(x+7\)
A zero of a polynomial is a value that makes the polynomial equal to 0. Substituting \(x=-7\) in \(x+7\) gives \(-7+7=0\), so its zero is \(-7\). In contrast, \(x-7\) has zero \(7\), so it is not correct. Exam tip: the zero of a linear polynomial \(ax+b\) is \(-\frac{b}{a}\).
Frequently asked questions
What is the correct answer to this question?
\(x+7\)
Why is this the correct answer?
A zero of a polynomial is a value that makes the polynomial equal to 0. Substituting \(x=-7\) in \(x+7\) gives \(-7+7=0\), so its zero is \(-7\). In contrast, \(x-7\) has zero \(7\), so it is not correct. Exam tip: the zero of a linear polynomial \(ax+b\) is \(-\frac{b}{a}\).
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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