What is the zero of (7-7x)?
Answer and explanation
Correct answer: 1
To find a zero, equate the polynomial to 0: \(7-7x=0\). Thus, \(7x=7\), so \(x=1\). Therefore, 1 is the zero of this polynomial. Although 0 is a possible-looking option, substituting \(x=0\) gives 7, not 0. Exam tip: Verify a zero by substituting it into the polynomial and checking whether the result is 0.
Frequently asked questions
What is the correct answer to this question?
1
Why is this the correct answer?
To find a zero, equate the polynomial to 0: \(7-7x=0\). Thus, \(7x=7\), so \(x=1\). Therefore, 1 is the zero of this polynomial. Although 0 is a possible-looking option, substituting \(x=0\) gives 7, not 0. Exam tip: Verify a zero by substituting it 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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