\(x^2-13x+7=0\) के मूलों का अंतर क्या है?
What is the difference between the roots of \(x^2-13x+7=0\)?
Explanation opens after your attempt
Correct Answer
A. \(\sqrt{141}\)
Concept
Here (D=(-13)2-4(1)(7)=141), so the difference of roots is \(\frac{\sqrt{D}}{|a|}=\sqrt{141}\). In exams, the difference of roots can be found directly from (D).
Why this answer is correct
The correct answer is A. \(\sqrt{141}\). Here (D=(-13)2-4(1)(7)=141), so the difference of roots is \(\frac{\sqrt{D}}{|a|}=\sqrt{141}\). In exams, the difference of roots can be found directly from (D).
Exam Tip
यहां (D=(-13)2-4(1)(7)=141), इसलिए मूलों का अंतर \(\frac{\sqrt{D}}{|a|}=\sqrt{141}\) है। परीक्षा में मूलों का अंतर सीधे (D) से मिल सकता है।
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