यदि \(x=\sqrt{7}-\sqrt{3}\), तो \(x^2\) क्या है?
If \(x=\sqrt{7}-\sqrt{3}\), what is \(x^2\)?
Explanation opens after your attempt
A. \(10-2\sqrt{21}\)
Concept
\(x^2=7+3-2\sqrt{21}=10-2\sqrt{21}\). In exams apply ((a-b)2=a-2+b-2-2ab).
Why this answer is correct
The correct answer is A. \(10-2\sqrt{21}\). \(x^2=7+3-2\sqrt{21}=10-2\sqrt{21}\). In exams apply ((a-b)2=a-2+b-2-2ab).
Exam Tip
\(x^2=7+3-2\sqrt{21}=10-2\sqrt{21}\) है। परीक्षा में ((a-b)2=a-2+b-2-2ab) लगाएं।
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