Tính $(97^{3}+83^{3}) ÷180-97×83$

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Tính
$(97^{3}+83^{3}) ÷180-97×83$

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Bơ 1 year 2020-10-21T22:08:29+00:00 2 Answers 87 views 0

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  1. Latifah
    0
    2020-10-21T22:09:39+00:00
    Reply

    Đáp án:

     

    Giải thích các bước giải:

     `(97^3+83^3):180-97.83`

    `={(97+83)(97^2-97.83+83^2)}/{180}-97.83`

    `={180.(97^2-97.83+83^2)}/{180}-97.83`

    `=97^2-97.83+83^2-97.83`

    `=97^2-2.97.83+83^2`

    `=(97-83)^2`

    `=14^2`

    `=196`

  2. Ladonna
    0
    2020-10-21T22:10:03+00:00
    Reply

    `(97^3+83^3)÷180-97.83`

    `=[(97+83)(97^2-97.83+83^2)]÷180-97.83`

    `=[180.(97^2-97.83+83^2)]÷180-97.83`

    `=97^2-97.83+83^2-97.83`

    `=(97-83)^2`

    `=196`

    Học tốt !

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )