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X square minus one upon x square |
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Answer» Step-by-step explanation: x² + 1/x² = 27 x² + 1/x² - 2 = 27 - 2 x² + 1/x² - 2 × X × 1/x = 25 ( x - 1/x )² = 5² x - 1/x = ± 5 |
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