Germany | A Nice Math Olympiad Algebra Problem

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  • Опубликовано: 2 окт 2024

Комментарии • 151

  • @jahangirkhan1739
    @jahangirkhan1739 Месяц назад +8

    If I watched a few videos like this, I would be mentally ill. 😂😂😂

    • @annoint3d2mvu
      @annoint3d2mvu 24 дня назад

      Me and you my friend, me and you!
      And the biggest question is when is this used in the real world?😅😅😅

  • @michellewelchman9245
    @michellewelchman9245 4 месяца назад +6

    I enjoyed your work and your explanation. Excellent and well done! These problems can be long and it took nearly three pages for this one! Lol Sometimes it feels like you're going down a math rabbit hole with no end but in the end when you do reach a solution (s) it's all good.

  • @DanielDimov358
    @DanielDimov358 2 месяца назад +10

    x^2 + (3x/x-3)^2 = 16
    x^2 = 16 - (3x/x-3)^2
    x^2 = 4^2 - (3x/x-3)^2
    (4^2 - (3x/x-3)^2 - difference of squares)
    x^2 = (4 - (3x/x-3))(4 + (3x/x-3))
    After simplifying the expressions in the parentheses...
    x^2 = (x-12/x - 3)(7x - 12/x - 3)
    Using polynomial division...
    x^2 = (1 - (9/x-3))(7 + (9/x-3))
    Then let 9/x - 3 = a
    From this we can express the x = (9 + 3a)/a
    And we can substitute in the equation to get...
    ((9 + 3a)/a)^2 = (1 - a)(7 + a)
    (9 + 3a)^2/a^2 = -a^2 - 6a + 7
    (9 + 3a)^2 = a^2(-a^2 - 6a + 7)
    Expanding the parentheses we get...
    9a^2 + 54a + 81 = -a^4 - 6a^3 + 7a^2
    a^4 + 6a^3 + 2a^2 + 54a + 81 = 0
    a^4 + 8a^3 - 2a^3 + 9a^2 + 9a^2 - 16a^2 + 72a - 18a + 81 = 0
    a^4 + 8a^3 - 9a^2 - 2a^3 - 16a^2 - 18a + 9a^2 + 72a + 81 = 0
    a^2(a^2 + 8a + 9) - 2a(a^2 + 8a + 9) + 9(a^2 + 8a + 9) = 0
    (a^2 + 8a + 9)(a^2 - 2a + 9) = 0
    Roots of first equation are:
    a1 = -4 + √7
    a2 = -4 - √7
    Roots of second equation are:
    a3 = 1 + 2√2i
    a4 = 1 - 2√2i
    Using the roots of the first equation...
    x = 9 + 3(-1 + √7)/-4 + √7 = -1 - √7
    x = 9 + 3(-1 - √7)/-4 - √7 = -1 + √7
    ...after multiplying by the conjugate.
    Very long and unnecessary I know, however it is the way I solved it and I wanted to share it.

  • @OlajiireTaiwo
    @OlajiireTaiwo Месяц назад +3

    Please always make your solution simple, to the subject interesting to all, first clear the squares and solve within a minute

  • @michaelhuppertz6738
    @michaelhuppertz6738 4 месяца назад +11

    Nice solution specially how got the (x-3) out of 6x^3+18x^2, neat trick.

  • @miloudchoukri9283
    @miloudchoukri9283 2 месяца назад +2

    لغة الرياضيات لغة عالمية موحدة كقانون كرة القدم حقيقة ما اجمل الرياضيات مع الوضعيات المعقدة التي تبحر بك في اعماق التفكير لحلها كنت محبا لهذه المادة والحمد لله افادتني في الحياة

    • @user-jj1sy3yh3v
      @user-jj1sy3yh3v 28 дней назад

      اكره مااكره الرياضيات وبسبب الرياضيات لم اصل لاهدافي وطموحي بالتعليم حسبي الله ونعم الوكيل

    • @Sci-Marvels
      @Sci-Marvels 21 день назад

      تماماً! لغة الرياضيات لغة عالمية توحدنا جميعاً، مثل قوانين كرة القدم. إنها تأخذنا في رحلة عميقة من التفكير لحل التحديات المعقدة. سعيد أن هذه المادة أفادتك في حياتك. الرياضيات حقاً رائعة! 😊📊

  • @oxfordmathseries
    @oxfordmathseries 4 месяца назад +45

    I prefer to get rid of fraction first, then solution will be of 2 minutes only

    • @Ron_DeForest
      @Ron_DeForest 4 месяца назад +8

      Would have been way faster and easier. So much less time to multiply through then gather terms.

    • @agustinamariarivarolaberra3013
      @agustinamariarivarolaberra3013 Месяц назад

      Yes,I agree

    • @jirah5397
      @jirah5397 Месяц назад +1

      C'est tres long ca se fait dans 3ou4 ligne . Tu n as qu'à la donné à un Marocain

    • @user-iz1wq7ou3r
      @user-iz1wq7ou3r Месяц назад

      Или българин​@@jirah5397

    • @AmiroVarinda
      @AmiroVarinda Месяц назад

      😂❤​@@Ron_DeForest

  • @خالدمدني-ح9ف
    @خالدمدني-ح9ف 2 месяца назад +1

    The solution become.complicated,rather than simplfied😮‬‏

  • @劉河順-n7k
    @劉河順-n7k 4 месяца назад +6

    It's a troubled solution.

  • @serifahmetgumus5763
    @serifahmetgumus5763 17 дней назад +1

    Kafa ütülemek matematiği hiç sevmem

  • @Aristotlearinzetv
    @Aristotlearinzetv 24 дня назад

    Binomial triangle can solve the equation in just few lines . You like extra sheet

  • @NadiehFan
    @NadiehFan 4 месяца назад +11

    A different approach which does not require a substitution and which does not require having to deal with fractions starts by multiplying both sides by (x − 3)² to get rid of the fraction. We can then proceed as follows
    x²(x − 3)² + 9x² = 16(x − 3)²
    x²(x² − 6x + 9) + 9x² = 16(x − 3)²
    x²(x² − 6x + 18) = 16(x − 3)²
    (x² − 3(x − 3) + 3(x − 3))(x² − 3(x − 3) − 3(x − 3)) = 16(x − 3)²
    (x² − 3x + 9)² − 9(x − 3)² = 16(x − 3)²
    (x² − 3x + 9)² − 25(x − 3)² = 0
    (x² − 3x + 9 + 5(x − 3))(x² − 3x + 9 − 5(x − 3)) = 0
    (x² + 2x − 6)(x² − 8x + 24) = 0
    x = −1 + √7 ⋁ x = −1 − √7 ⋁ x = 4 + 2i√2 ⋁ x = 4 − 2i√2

    • @laurentbeyer2458
      @laurentbeyer2458 4 месяца назад

      I would have done same 👍🏻

    • @TapanDas-ei3lw
      @TapanDas-ei3lw 4 месяца назад

      You're also a great genius ❤❤❤

    • @anjalidilipogale4208
      @anjalidilipogale4208 2 месяца назад

      More simpler

    • @DanielDimov358
      @DanielDimov358 2 месяца назад

      Where does line №4 come from?

    • @NadiehFan
      @NadiehFan 2 месяца назад

      @@DanielDimov358 If you have two quantities a and b then their average is ½(a + b). Since a and b are equidistant from their own average, you can get the original quantities back by adding half their difference ½(a − b) to their average and by subtracting half their difference from their average. That is, we have
      a = ½(a + b) + ½(a − b)
      b = ½(a + b) − ½(a − b)
      The average of x² and x² − 6x + 18 is half their sum, which is x² − 3x + 9 = x² − 3(x − 3) and their difference is x² − (x² − 6x + 18) = 6x − 18 = 6(x − 3) so half their difference is 3(x − 3). Therefore, we have
      x² = x² − 3(x − 3) + 3(x − 3)
      and
      x² − 6x + 18 = x² − 3(x − 3) − 3(x − 3)
      Consequently, the product x²(x² − 6x + 18) can be written as
      (x² − 3(x − 3) + 3(x − 3))(x² − 3(x − 3) − 3(x − 3))
      and applying the difference of two squares identity (a + b)(a − b) = a² − b² this gives
      (x² − 3(x − 3))² − 9(x − 3)²
      or
      (x² − 3x + 9)² − 9(x − 3)²

  • @chimumaziku3186
    @chimumaziku3186 2 месяца назад +2

    Yeeeeee my brain already bursted🤣🤣🤣

  • @lidzusakayina6842
    @lidzusakayina6842 3 месяца назад +1

    How did you know😮

  • @martinreichard3243
    @martinreichard3243 4 месяца назад +2

    I prefer to take the square root first and then expand with x-3. This is faster.

  • @TewabechEshete-pi3fz
    @TewabechEshete-pi3fz 2 месяца назад

    too long solution that's why many of us ignored Maths . From your side, excellent potential !

  • @ahmadikininga239
    @ahmadikininga239 Месяц назад

    Please give a sense to those x and numbers. Be realistic. Don't speak in signs. Unless you are hiding something.

  • @ajmiller7102
    @ajmiller7102 4 месяца назад +5

    Excellent. Straight to the solutions. Well done!

  • @ahadjonxamidov8940
    @ahadjonxamidov8940 4 месяца назад

    Zo‘r

  • @bernayarimoglu5311
    @bernayarimoglu5311 18 дней назад

    In Turkiye, in university enterance examinations, you have only 1 or 2 minutes to solve this

  • @souzasilva5471
    @souzasilva5471 4 дня назад

    Não acredito que o melhor professor do mundo tenha uma visão de primeira, para saber que o caminho é este aplicado nesta questão.(I don't believe that the best teacher in the world has the first-class vision to know which way is applied to this issue.)

  • @RejepOrazmetow
    @RejepOrazmetow 3 месяца назад +14

    Как прекрасен язык математики. Всё понятно, подробно объясняно. Учитель супер. Спасибо за ролик.

  • @despoinavavoula2203
    @despoinavavoula2203 2 месяца назад +1

    This is crazy!

  • @catdoan9281
    @catdoan9281 19 дней назад

    Clumsy solution. You try to over complicate the solution.

  • @antokrys6344
    @antokrys6344 3 месяца назад

    Too long way and time

  • @PrudentVictor-q6d
    @PrudentVictor-q6d 29 дней назад

    Good evening ma. Pls i need help in advance level math and physics pls.

  • @LANNGUYEN-kv6jl
    @LANNGUYEN-kv6jl Месяц назад

    The ưay you solve this equation sis SO LONG.

  • @edemkoffiaholou9808
    @edemkoffiaholou9808 Месяц назад

    Pourquoi tu nous dis que racine carré de I est égal encore à i? Ça n'a pas de sens. Il y a un problème avec le résultat à la fin

  • @ASKstrive
    @ASKstrive 16 дней назад

    That is also how learning german will treat you as bigginer.

  • @HermanGATETE-nm5zj
    @HermanGATETE-nm5zj 5 дней назад

    All these hours, just only to find X 😂

  • @FelekeAsefa-p6y
    @FelekeAsefa-p6y 3 месяца назад

    The correct answer is: $x = 0$
    Explanation: In the previous responses, we found that the equation $x^{2}+(\frac {3x}{x-3})^{2}=16$ has only one solution, which is $x = 0$. This is because when we substitute $x = 0$ into the equation, both terms on the left-hand side become zero, resulting in the equation being satisfied. Therefore, $x = 0$ is the only value of x that satisfies the equation $x^{2}+(\frac {3x}{x-3})^{2}=16$.

  • @MinhTran-xy7hy
    @MinhTran-xy7hy Месяц назад

    X2( x3)2=16X yes and nos
    (x-3). =^ ./.

  • @Georg.Löding
    @Georg.Löding 18 дней назад

    I really like his explainations! 10 of 10 again. Thank you!

  • @romelitobragas9279
    @romelitobragas9279 Месяц назад

    Im not a verygood mathematecians. But i know how to solve problems.in algebra.and calculus.

  • @camairenentertainment254
    @camairenentertainment254 Месяц назад

    No wonder I was failing maths
    Did the teacher seriously expect me to memorise all this 😳

  • @ポン吉ポン田
    @ポン吉ポン田 4 месяца назад

    It can be solved by converting x to a trigonometric function.
    (x/4)^2 + (3x/(4(x-3)))^2 = 1
    x/4 = cos
    3x/(4(x-3)) = sin
    16(cs)^2 - 18cs - 9 = 0

  • @jahangirkhan1739
    @jahangirkhan1739 Месяц назад

    Why does algebra have such complications and confusing sequence to solve the problem?😂😂

  • @danielo.m.288
    @danielo.m.288 Месяц назад

    Hope this can be useful in real life

  • @TapanDas-ei3lw
    @TapanDas-ei3lw 4 месяца назад

    Never ending marathon mathematics and brain 🧠 puzzled stories ever. Einstein newton and all superb mathematicians brain to be needed to understood not like me the stupid one..not getting any sweet juice extract from your mathematics, all energies i have lost to get it understood sir .really sir you've the genius brain and you're great.❤❤❤after this life i shall pray to God ,make me genius like you.❤❤❤❤❤

  • @Alexanderdegrey765Majuedkelucb
    @Alexanderdegrey765Majuedkelucb Месяц назад

    Mbledh e zbret ate q t jep mendja pa terrible fikse

  • @augustinimoraru2693
    @augustinimoraru2693 7 дней назад

    E(x)=(x²+mx+n)(x²+px+q), m,n,p,q€Z

  • @josephissara3599
    @josephissara3599 2 месяца назад

    So the underroot of negative one is i, how about the underroot of another negative number?

  • @peterbyrne6394
    @peterbyrne6394 4 месяца назад +1

    Thank you. very nice solved equation.

  • @esauogutu1702
    @esauogutu1702 2 месяца назад

    The secret to solving the equation is formulating it into a product of two quadratic expressions that gives zero

  • @BaDin-cx9ws
    @BaDin-cx9ws Месяц назад

    Too long way method.

  • @mbuyaelyaoni6266
    @mbuyaelyaoni6266 2 месяца назад

    Mmh, till tomorrow 😅😅

  • @ZoukalneLeonLaboulbe
    @ZoukalneLeonLaboulbe Месяц назад

    Très longue comme méthode

  • @YaoCaeuArmelKOUADIO
    @YaoCaeuArmelKOUADIO Месяц назад

    You forget the square on i for the first solution 😅

  • @ВасильГецко-з7ш
    @ВасильГецко-з7ш Месяц назад

    ТА ЧТО ЗДЕСЬ РИШАТЬ,ЛИХКО И ПРОСТО ,КАК НА ГОРШКЕ ПОСИДЕТЬ🪺

  • @mintusaren895
    @mintusaren895 Месяц назад

    Why al zebra unknown vs unknown.

  • @bedelludesta5508
    @bedelludesta5508 23 дня назад

    I don’t understand it. First you need to explain what are 2 and x represent

  • @zineelabidinebouhaous9326
    @zineelabidinebouhaous9326 Месяц назад

    حين كنا ندرس في الثانوي لا يمكن الانطلاق الا بمجموعة تعريف اي استثناء أن يكون x#3 ضرورية قبل الانطلاق

  • @olympiadeduworks
    @olympiadeduworks Месяц назад

    great

  • @gandhingira4071
    @gandhingira4071 Месяц назад

    Jesus!

  • @aysedinc5756
    @aysedinc5756 3 месяца назад

    Ne kadar sacma bi soru

  • @dewanfamuji5731
    @dewanfamuji5731 Месяц назад

    You missed that x not allowed 3

  • @hossouzoffoun
    @hossouzoffoun 2 месяца назад

    Rien que d'erreur

  • @gelanaadugna7808
    @gelanaadugna7808 Месяц назад

    I am great sorry to you! why do you take 16 minute for 1 question? Why you make it coplex?

  • @SakeerHussain-gu4sm
    @SakeerHussain-gu4sm 2 месяца назад

    10

  • @ahmedder3608
    @ahmedder3608 17 дней назад

    Solution lente

  • @DimosoAbduly
    @DimosoAbduly 2 месяца назад

    4

  • @foltapiotrfolta5148
    @foltapiotrfolta5148 2 месяца назад

    4

  • @armandoolpindo-b3q
    @armandoolpindo-b3q 3 месяца назад

    mali yong sulution, Pinaha ba mali naman

  • @romelitobragas9279
    @romelitobragas9279 Месяц назад

    Long methods of solution.
    What about short method sir?

  • @FatimaFatima-eu7ix
    @FatimaFatima-eu7ix 8 дней назад

    Mamma mia 😢

  • @abdelillahzahri8079
    @abdelillahzahri8079 11 дней назад

    ،faute

  • @jummyshaki2922
    @jummyshaki2922 2 месяца назад

    So long a letter

  • @JuanCarlosMontoya-z2k
    @JuanCarlosMontoya-z2k 3 месяца назад

    Para que sirve eso, si no sabe para que es

  • @anuarsalomao9748
    @anuarsalomao9748 4 месяца назад +1

    COMPLICADO

  • @louiskah4753
    @louiskah4753 3 месяца назад

    C'est une identité remarquable ❤

  • @mintusaren895
    @mintusaren895 Месяц назад

    Result same

  • @rajanisarmah6307
    @rajanisarmah6307 4 месяца назад

    Aare vaai itni si sota math aur kitna lomba korega??

  • @joachimkaran6687
    @joachimkaran6687 2 месяца назад

    Amna kitu umetupereka op

  • @yanssala2214
    @yanssala2214 2 месяца назад

    Parece equivalente a un polinomio de 4to grado, entonces habrian cuatro posibles valores de x
    X^4 -2X^3-6X^2+32X -16=0 es equivalente al problema propuesto.
    Un valor real obtenido por metodos iterativos seria 0,56895 con error no superior a. 0, 0006 😂😂😂

  • @samswift4921
    @samswift4921 4 месяца назад

    C 1.4 hrs or 84 minutes.

  • @bandoubenamar2802
    @bandoubenamar2802 3 месяца назад

    I no 😂

  • @hope9203
    @hope9203 2 месяца назад

    Very nice ✅

  • @joachimkaran6687
    @joachimkaran6687 2 месяца назад

    Umekosea APO

  • @francescobonacorsi5778
    @francescobonacorsi5778 3 месяца назад

    Impressionante

  • @williamvasquezvasquez9878
    @williamvasquezvasquez9878 Месяц назад

    My brain just turned to mush after watching this🫠

  • @SaraAlam-l9t
    @SaraAlam-l9t Месяц назад

    It's so simple

  • @TheTeller2012
    @TheTeller2012 4 месяца назад

    X-x/3-1=0

  • @BambadjiFall
    @BambadjiFall 3 месяца назад

    ❤❤❤❤❤❤❤❤❤❤

  • @olympiadeduworks
    @olympiadeduworks Месяц назад

    nice

  • @divineinspiration3342
    @divineinspiration3342 4 месяца назад

    Spreco di carta

  • @Dino-Kukolj
    @Dino-Kukolj 2 месяца назад

    Too long explanation and you should have switched to the quadratic equasion earlier, it was inevitable and as far as I know there is no negative square root, because any negative number squared gives a positive number, and a positive number squared is anyway positive

  • @himadrikhanra7463
    @himadrikhanra7463 4 месяца назад

    1/10..?

  • @tatyanasnisarenko1627
    @tatyanasnisarenko1627 4 месяца назад

    Х=2

  • @tamarshahverdyan2723
    @tamarshahverdyan2723 4 месяца назад

    # 30 #

  • @fentlove9392
    @fentlove9392 Месяц назад

    This shows us how long, hard and tiresome it is to come up with a constitution..Dont blame your government too much😅

  • @mohammadwatan1992
    @mohammadwatan1992 5 дней назад

    👍

  • @mohamedsalah5525
    @mohamedsalah5525 4 месяца назад

    4-

  • @gatabaziemmanuel
    @gatabaziemmanuel 2 месяца назад

    Good

  • @alexpangani1944
    @alexpangani1944 3 месяца назад

    Nice

  • @gatabaziemmanuel
    @gatabaziemmanuel 2 месяца назад

    Excellent

  • @ednalee3083
    @ednalee3083 Месяц назад

    前面都看懂了,后面根号里公式不记得了,为什么-1开根号变成i😅

  • @mahmoudibra5822
    @mahmoudibra5822 4 месяца назад

    Beautiful

  • @AVELINETOMEKA
    @AVELINETOMEKA 2 месяца назад

    Make people understand 😅😅😅😅😅😅😅😅😅

  • @ЗемфираШаргазина
    @ЗемфираШаргазина 4 месяца назад

    Почему в ответе Вы сократили на 2..????
    Так нельзя!!!

  • @АЛЕКСАНДРВАН-о9ч
    @АЛЕКСАНДРВАН-о9ч 2 месяца назад

    Ой, раздули из простого решения целое математическое расследование