If x = 3 + 2√2, find the value of \({\left( {\sqrt x - \frac{1}{{\sqrt x }}} \right)^2}\)

If x = 3 + 2√2, find the value of \({\left( {\sqrt x - \frac{1}{{\sqrt x }}} \right)^2}\)
1). 2√2
2). 4√2
3). 2
4). 4

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