Quantitative Aptitude Algebra

ಒಂದು ವೇಳೆ \(\rm x^2y^2+\frac{1}{x^2y^2}=83\) ಆಗಿದ್ದರೆ, \(\rm xy-\frac{1}{xy}\) ನ ಮೌಲ್ಯವೇನು?

1

85

2

9

3

10

4

81

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