यदि \(x=\sqrt{10}-\sqrt{2}\), तो \(x^2\) किसके बराबर है?
If \(x=\sqrt{10}-\sqrt{2}\), what is \(x^2\) equal to?
Explanation opens after your attempt
A. \(12-4\sqrt{5}\)
Concept
Use ((a-b)2=a-2-2ab+b-2).
Why this answer is correct
\(x^2=10-2\sqrt{20}+2=12-4\sqrt{5}\).
Exam Tip
In the middle term (-2ab), write both the sign and the surd carefully. चरण 1: ((a-b)2=a-2-2ab+b-2) लगाएँ। चरण 2: \(x^2=10-2\sqrt{20}+2=12-4\sqrt{5}\)। चरण 3: बीच वाले पद (-2ab) में चिह्न और मूल दोनों ध्यान से लिखें।
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