Question

please tell fast and explain ​

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

$\sqrt{ \frac{ \sqrt{2} - 1 }{ \sqrt{2} + 1} \times \frac{ \sqrt{2} - 1}{ \sqrt{2} - 1} } \\ \sqrt{ \frac{2 + 1 - 2 \sqrt{2} }{1} } \\ \sqrt{3 - 2 \sqrt{2} } \\ \sqrt{3 - 2.82} \\ \sqrt{0.18} \\ 0.423 \\ \\ hope \: it \: will \: help \: you \:$