Which linear polynomial gives (-7) at (x=0)?
Answer and explanation
Correct answer: \(2x-7\)
For a linear polynomial \(ax+b\), putting \(x=0\) gives \(b\), the constant term. For \(2x-7\), \(2(0)-7=-7\). Although \(7x-2\) has a negative constant term, its value at zero is \(-2\), not \(-7\). Exam tip: At \(x=0\), identify the polynomial’s value directly from its constant term.
Frequently asked questions
What is the correct answer to this question?
\(2x-7\)
Why is this the correct answer?
For a linear polynomial \(ax+b\), putting \(x=0\) gives \(b\), the constant term. For \(2x-7\), \(2(0)-7=-7\). Although \(7x-2\) has a negative constant term, its value at zero is \(-2\), not \(-7\). Exam tip: At \(x=0\), identify the polynomial’s value directly from its constant term.
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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