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x^2 - 2 + 1 /x^2 =...

`x^2` - 2 + `1 /x^2` = ____

A

`(x - `1 / x` )^2`

B

`(`1 // x - 3`)^2`

C

`(3x - `(1 / x)`)^2`

D

None

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