If \(\sqrt x - \frac{1}{{\sqrt x }}\; = \;3\sqrt 2\) , then \({x^2} + – McqOptions

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1.	If \(\sqrt x - \frac{1}{{\sqrt x }}\; = \;3\sqrt 2\) , then \({x^2} + \frac{1}{{{x^2}}}\) is equal to:
A.	398
B.	402
C.	324
D.	326
Answer» B. 402

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