Math question that looks easy but ... very tricky

Поділитися
Вставка
  • Опубліковано 22 гру 2024

КОМЕНТАРІ • 14

  • @theragingranga9484
    @theragingranga9484 Місяць тому +6

    Good question. I wouldn't call it tricky (if you know the quad formula and complex number rules) but a very satisfying solution.

  • @Marinealver
    @Marinealver Місяць тому +1

    Me with a first look at the problem.
    "It's going to involve complex numbers."
    It involved complex numbers.

  • @charlescedricryder
    @charlescedricryder 23 дні тому

    Really great

  • @heff6119
    @heff6119 Місяць тому +4

    let x=2+z; y=2-z
    xy=16
    (2+z)(2-z)=16
    2^2-z^2=16
    4-z^2=16
    z^2=-12
    z=+-sqrt(-12)
    z=+-sqrt(-1*4*3)
    z=+-2i*sqrt3
    z=2i*sqrt3 --> x=2+2i*sqrt3; y=2i*sqrt3
    z=-2i*sqrt3 --> ×=2-2i*sqrt3; y=2+2i*sqrt3

  • @RealQinnMalloryu4
    @RealQinnMalloryu4 Місяць тому +1

    (2)+(2)=4 (y ➖ 2x+2). 4^4 2^2^2^2 1^1^1^2 1^2 (xy ➖ 2xy+1).

  • @CAustin582
    @CAustin582 Місяць тому +4

    There's no need to work out the values for y, since the commutative property makes them obvious.

  • @currypenguin
    @currypenguin Місяць тому +1

    Math is beautiful

  • @Pero-9000iq
    @Pero-9000iq Місяць тому

    Wow I always thought a sum like this

  • @skyblue4558
    @skyblue4558 Місяць тому

    Why are your videos all the same but slighly changing the numbers? UA-cam is such a stupiiiidddd system

  • @ChrisSpille
    @ChrisSpille Місяць тому

    SO many unnecessary steps man... do we really need an entire step to clarify that -(-4)=4 and 2×1=2? If i did math like this when I was in college I would have used an entire binder of paper for each homework assignment...

    • @JayOnDaCob
      @JayOnDaCob Місяць тому +1

      I mean it really doesn’t matter it’s like getting upset at someone for writing the chain rule when finding d(sin^2(x))/dx, if they want to write 2(sin(x))*cos(x) as 2sin(x)cos(x) the next step, it’s fine as it makes the rest of the problem easier to track

    • @hellfire9145
      @hellfire9145 Місяць тому +1

      I think he is a good teacher

    • @kevinbickerstaff4279
      @kevinbickerstaff4279 Місяць тому +1

      Very wordy. Took twice the time it should have.