यदि \(z=\sqrt{13}-\sqrt{5}\) है, तो \(z^2\) का मान कौन-सा है?
If \(z=\sqrt{13}-\sqrt{5}\), which is the value of \(z^2\)?
Explanation opens after your attempt
A. \(18-2\sqrt{65}\)
Concept
(\(\sqrt{13}-\sqrt{5}\)2=13+5-2\sqrt{65}). The middle term remains negative.
Why this answer is correct
The correct answer is A. \(18-2\sqrt{65}\). (\(\sqrt{13}-\sqrt{5}\)2=13+5-2\sqrt{65}). The middle term remains negative.
Exam Tip
(\(\sqrt{13}-\sqrt{5}\)2=13+5-2\sqrt{65}) है। मध्य पद का चिन्ह ऋणात्मक रहेगा।
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