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（999）²

    • Posted by Gulam Rabbani 6 years, 6 months ago

    CBSE > Class 09 > Mathematics
    • 2 answers

    Gulam Rabbani 6 years, 6 months ago

    Thanks

    0Thank You

    Yogita Ingle 6 years, 6 months ago

    9992 = (1000 - 1)2
    Using identity, (a - b) 2 = a 2 + b 2 -2ab
    (1000 - 1)2 =(1000) 2 + (1) 2 - 2(1000×1)
    = 1000000 + 1 - 2000
    = 1000001 - 2000
    = 998001

     

    0Thank You

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