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Step-by-step explanation:
(x-1/x)^2 = x^2 + 1/x^2 - 2
1/4 + 2 = x^2 + 1/x^2
9/4 = x^2 + 1/x^2___[1]
4x^2 + 4/x^2
4(x^2 + 1/x^2)
4(9/4)
9__ans.
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