Teaching Chandigarh JBT PRT Mock Test 2023-24 Quantitative Aptitude Algebra Identities

यदि x2 - 7x + 1 = 0, और 0 < x < 1,  x2 - \(\frac{1}{x^2}\) का मान क्या है?

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