Which option has coefficient of (x) equal to (5) and zero (-1)?
Answer and explanation
Correct answer: \(5x+5\)
In the polynomial \(5x+5\), the coefficient of \(x\) is \(5\). To find its zero, set \(5x+5=0\). This gives \(5x=-5\), so \(x=-1\). Although \(5x-5\) also has coefficient \(5\), its zero is \(1\), not \(-1\). 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?
\(5x+5\)
Why is this the correct answer?
In the polynomial \(5x+5\), the coefficient of \(x\) is \(5\). To find its zero, set \(5x+5=0\). This gives \(5x=-5\), so \(x=-1\). Although \(5x-5\) also has coefficient \(5\), its zero is \(1\), not \(-1\). 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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