if x²-4x=1, find values of x+1/x and x²-1/x² plz help fast it’s urgent​

Question

if x²-4x=1, find values of x+1/x and x²-1/x² plz help fast it’s urgent​

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Sarah 3 months 2021-07-25T18:51:37+00:00 2 Answers 0 views 0

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    0
    2021-07-25T18:52:52+00:00

    Step-by-step explanation:

    x2−3x+1=0∣(a±b)2=a2±2ab+b2

    (x−32)2−94+1=0∣+54

    (x−32)2=54∣√

    x−32=±5√2∣+32

    x=3±5√2

    x2=14±65√4

    1×2=414±65√=4×(14∓65√)16

    So

    x2−1×2=14±65√4−4×(14±65√)16=4×(14±65√)−4×(14∓65√)16=±48×5√16=±3×5–√

    0
    2021-07-25T18:53:21+00:00

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