Which option has coefficient of (x) equal to (6) and zero (-2)?
Answer and explanation
Correct answer: \(6x+12\)
To find the zero of \(6x+12\), set \(6x+12=0\). This gives \(6x=-12\), so \(x=-2\). Its coefficient of \(x\) is also \(6\), so option B is correct. Although \(6x-12\) has coefficient 6, its zero is \(2\). Exam tip: the zero of a linear polynomial \(ax+b\) is \(-b/a\).
Frequently asked questions
What is the correct answer to this question?
\(6x+12\)
Why is this the correct answer?
To find the zero of \(6x+12\), set \(6x+12=0\). This gives \(6x=-12\), so \(x=-2\). Its coefficient of \(x\) is also \(6\), so option B is correct. Although \(6x-12\) has coefficient 6, its zero is \(2\). Exam tip: the zero of a linear polynomial \(ax+b\) is \(-b/a\).
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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