If (p(x)=9-3x), what is its zero?
Answer and explanation
Correct answer: 3
To find the zero, set the polynomial equal to zero: \(9-3x=0\). Thus, \(3x=9\), so \(x=3\). Therefore, 3 is the correct answer. Substituting \(-3\) gives \(9-3(-3)=18\), not zero. In an exam, verify a zero by substituting the value back into the polynomial and checking whether the result is 0.
Frequently asked questions
What is the correct answer to this question?
3
Why is this the correct answer?
To find the zero, set the polynomial equal to zero: \(9-3x=0\). Thus, \(3x=9\), so \(x=3\). Therefore, 3 is the correct answer. Substituting \(-3\) gives \(9-3(-3)=18\), not zero. In an exam, verify a zero by substituting the value back into the polynomial and checking whether the result is 0.
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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