x^3+6x^2+12x+8=0 bbbbbbbbbbbbbbbbbbbbbb

x^3+6x^2+12x+8=0 bbbbbbbbbbbbbbbbbbbbbb

0 thoughts on “x^3+6x^2+12x+8=0 bbbbbbbbbbbbbbbbbbbbbb”

  1. Đáp án: $x=-2$

    Giải thích các bước giải:

    Ta có:

    $x^3+6x^2+12x+8=0$

    $\to x^3\cdot x^2\cdot 2+3\cdot x\cdot 2^2+2^3=0$

    $\to (x+2)^3=0$

    $\to x+2=0$

    $\to x=-2$

    Reply
  2. $x^3+6x^2+12x+8=0  $

    $<=>x^3+6x^2+12x+2^3=0$

    $<=>x^3+3x^22+3×2^2+2^3=0$

    $<=>(x+2)^3=0$

    $<=>x+2=0$

    $<=>x=-2$

    Vậy phương trình có nghiệm là $-2$

    Reply

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