Quantitative Aptitude Algebra Identities

If \(\left( x-\frac{1}{x}\right)^{2} \) = 12, what is the value of \(\left( x^{2}-\frac{1}{x^2}\right)\), given that x > 0? 

1
\(6\sqrt{2}\)
2
\(8\sqrt{3}\)
3
\(6\sqrt{3}\)
4
\(8\sqrt{2}\)

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