Quantitative Aptitude Algebra Identities

x2 - 7x + 1 = 0, మరియు 0 < x < 1 అయితే, x2 - \(\frac{1}{x^2}\) విలువ ఎంత?

1
\(21 \sqrt{5}\)
2
\(-21 \sqrt{5}\)
3
\(28 \sqrt{5}\)
4
\(-28 \sqrt{5}\)

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