Quantitative Aptitude Algebra Identities

જો x2 - 7x + 1 = 0, અને 0 < x < 1, તો x2 - \(\frac{1}{x^2}\)ની કિંમત શોધો.

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

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