x+1/x=5 then find x^2-1/x^2 in short method

Question

x+1/x=5 then find x^2-1/x^2 in short method

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Hailey 1 week 2021-09-05T07:43:27+00:00 1 Answer 0 views 0

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    2021-09-05T07:44:43+00:00

    Answer:

    • (x+1/x) =5
    • (x+1/x) ^2=25
    • x^2+1/x^2+2*x*1/x=25
    • x^2+1/x^2+2=25
    • x^2+1/x^2=25-2=25 Is answer

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