यदि (p(x)) परिमेय गुणांकों वाला द्विघात बहुपद है और उसका एक शून्यक \(2+\sqrt{7}\) है, तो दूसरा शून्यक कौन सा होगा?
If (p(x)) is a quadratic polynomial with rational coefficients and one zero is \(2+\sqrt{7}\), what will be the other zero?
Explanation opens after your attempt
A. \(2-\sqrt{7}\)
Concept
With rational coefficients, \(a+\sqrt{b}\) is accompanied by \(a-\sqrt{b}\). In exams identify conjugate zeroes quickly.
Why this answer is correct
The correct answer is A. \(2-\sqrt{7}\). With rational coefficients, \(a+\sqrt{b}\) is accompanied by \(a-\sqrt{b}\). In exams identify conjugate zeroes quickly.
Exam Tip
परिमेय गुणांकों में \(a+\sqrt{b}\) के साथ \(a-\sqrt{b}\) भी शून्यक आता है। परीक्षा में संयुग्मी शून्यकों को तुरंत पहचानें।
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