(\(\sqrt{23}+5\)2-\(\sqrt{23}-5\)2) का मान क्या है?
What is the value of (\(\sqrt{23}+5\)2-\(\sqrt{23}-5\)2)?
Explanation opens after your attempt
Correct Answer
C. \(20\sqrt{23}\)
Concept
Use ((a+b)2-(a-b)2=4ab). Here \(a=\sqrt{23}\) and (b=5), so the value is \(20\sqrt{23}\).
Why this answer is correct
The correct answer is C. \(20\sqrt{23}\). Use ((a+b)2-(a-b)2=4ab). Here \(a=\sqrt{23}\) and (b=5), so the value is \(20\sqrt{23}\).
Exam Tip
पहचान ((a+b)2-(a-b)2=4ab) लगाएं। यहाँ \(a=\sqrt{23}\) और (b=5), इसलिए मान \(20\sqrt{23}\) है।
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