If x^{2}y^{2} + {1}/{x^{2}y^{2}} = 83, then the value of xy−\frac{1}{xy} is:

RRB NTPC CBT I 4 Jan 2021 Shift 1 Paper

Question : 12 of 100

Marks: +1, -0

If

x^{2}y^{2} + \;{1}/{x^{2}y^{2}} = 83

, then the value of

xy−\;{1}/{xy}

is:

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