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Question

root x minus 1/root x=5 find xsquare plus 1/x square

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Solution

Dear Student,

x - 1x = 5 x - 1x2 = 52 = 25 x + 1x - 2x1x = 25 x + 1x = 25 + 2 = 27 x + 1x2 = 272 = 729 x2 + 1x2 + 2x1x = 729 x2 + 1x2 = 729 - 2 = 727

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