SSC SSC CPO Mock Test Series 2025 (Tier I & II) (DP SI & CAPF) Quantitative Aptitude Algebra Identities

\(x^2+\frac{1}{x^2}=23\) then \(x+\frac{1}{x}=\)_______

1
\( \pm \sqrt {27} \)
2
\( \pm \sqrt {21} \)
3

±5

4

±6

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