When [x + (1/x)] = 5, then what is the value of [x - (1/x)]? - Exam Yatra

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When [x + (1/x)] = 5, then what is the value of [x - (1/x)]?

[2017 SSC CGL 16 AUG Shift 1]

A 11

B ± √22

C 21

D ± √21

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