What is the zero of the linear polynomial (x+21)?
Answer and explanation
Correct answer: \(-21\)
A zero of a polynomial is a value that makes the polynomial equal to 0. Setting \(x+21=0\) gives \(x=-21\). Therefore, \(-21\) is the correct answer. If \(21\) is substituted, the value is \(21+21=42\), so it is not a zero. Exam tip: To find a zero, equate the polynomial to 0 and solve for \(x\).
Frequently asked questions
What is the correct answer to this question?
\(-21\)
Why is this the correct answer?
A zero of a polynomial is a value that makes the polynomial equal to 0. Setting \(x+21=0\) gives \(x=-21\). Therefore, \(-21\) is the correct answer. If \(21\) is substituted, the value is \(21+21=42\), so it is not a zero. Exam tip: To find a zero, equate the polynomial to 0 and solve for \(x\).
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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