Solving A Nice Equation

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  • Опубликовано: 4 окт 2024
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Комментарии • 13

  • @awahan
    @awahan 5 дней назад +11

    You can also treat as a difference of two squares, then you can factor it directly

  • @DarkLantern1
    @DarkLantern1 4 дня назад +2

    You can also divide both sides by (x-1)^4 and treat it as a 4th root of unity question

  • @Blaqjaqshellaq
    @Blaqjaqshellaq 5 дней назад +1

    In addition, x^4 - (x-1)^4=[x^2+(x-1)^2]*[x^2-(x-1)^2]=[x^2+(x-1)^2]*[x+(x-1)]*[x-(x-1)].
    If x^4 - (x-1)^4=0, it follows that (2*x^2-2*x+1)*(2*x-1)*2=0.
    If 2*x - 1=0, then x=1/2, giving us one of the roots.
    If 2*x^2 - 2*x +1=0, this quadratic equation gives us the other two roots, (1+i)/2 and (1-i)/2.

  • @r4_in_space
    @r4_in_space 5 дней назад

    When a function is shifted, that's called a translation.

  • @Gezraf
    @Gezraf 5 дней назад +1

    there's a method similar to the 2nd method. instead of relying on conjugates, you could divide both sides by (x-1)^4, so that:
    (x/(x-1))^4 = 1
    take the 4th root
    x/(x-1) = +-1
    x/(x-1) = 1 --> x = x-1 --> false
    x/(x-1) = -1 --> x = 1 - x --> 2x = 1 --> x = 1/2

  • @williamperez-hernandez3968
    @williamperez-hernandez3968 5 дней назад +1

    For 2nd Method, instead of taking 4th root, take only square root. Then we get two equations: 1. x^2 = (x-1)^2, and 2. x^2 = - (x-1)^2. Equation 1 simplifies to 2x=1, so x=1/2. Equation 2 simplifies to 2x^2 - 2x +1 = 0, with complex solutions x = (1+ i)/2 and x = (1-i)/2.

    • @ytlongbeach
      @ytlongbeach 5 дней назад

      Yes, this is exactly what i did, also !!

  • @elmer6123
    @elmer6123 5 дней назад

    Substitute x=y+1/2 into the given equation and see how many terms cancel out.
    (y+1/2)^4-(y-1/2)^4=2*4[(1/2)y^3+(1/2)^3*y]=0
    Factor out 4y: 4y(y^2+1/4)=0, so y=0 or y=±i/2
    Thus, x=y+1/2=1/2 or (1±i)/2

  • @trojanleo123
    @trojanleo123 5 дней назад

    You used variable "u" and forgot to say Happy birthday to U. 🤣🤣🤣

  • @phill3986
    @phill3986 5 дней назад

    👍👏😀☮️✌️✌️☮️😀👏👍

  • @key_board_x
    @key_board_x День назад

    x⁴ = (x - 1)⁴
    x⁴ - (x - 1)⁴ = 0
    (x²)² - [(x - 1)²]² = 0 → recall: a² - b² = (a + b).(a - b)
    [x² + (x - 1)²].[x² - (x - 1)²] = 0
    [x² + (x² - 2x + 1)].[x² - (x² - 2x + 1)] = 0
    [x² + x² - 2x + 1].[x² - x² + 2x - 1] = 0
    (2x² - 2x + 1).(2x - 1) = 0
    First case: (2x + 1) = 0
    2x + 1 = 0
    2x = - 1
    x = - 1/2
    Second case: (2x² - 2x + 1) = 0
    2x² - 2x + 1 = 0
    Δ = (- 2)² - 4.(2 * 1) = 4 - 8 = - 4 = 4i² = (2i)²
    x = (2 ± 2i)/4
    x = (1 ± i)/2

  • @prollysine
    @prollysine 5 дней назад

    by faktoring , multp. *(-1/2) , 4x^3 -- 6x^2 + 4x - 1 = 0 , (2x-1)(2x^2-2x+1)=0 , 2x-1=0 , x=1/2 ,
    +4 -2 2x^2-2x+1=0 , x=(2+/-V(4-8))/4 , x=(2+/-V(-4))/4 ,
    -4 +2 x=(2+/-i*V(4))/4 , x= (1/2+i/2) , (1/2-i/2) ,
    +2 -1 = 0 , test , (1/2)^4=1/16 , (1/2-1)^4=1/16 ,
    (1/2+i/2)^4=-1/4 , (1/2+i/2-1)^4=-1/4 , OK ,
    solu , x= 1/2 , (1/2+i/2) , (1/2-i/2) , (1/2-i/2)^4=-1/4 , (1/2-i/2-1)^4=-1/4 , OK ,

  • @Don-Ensley
    @Don-Ensley 4 дня назад +1

    x ∈ { ½, ½ - ⁱ/₂, ½ + ⁱ/₂ }