this post was submitted on 11 Jan 2024
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A math lesson from 4chan (sh.itjust.works)
submitted 2 years ago by Early_To_Risa@sh.itjust.works to c/4chan@lemmy.world
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[–] lvxferre@lemmy.ml 9 points 2 years ago* (last edited 2 years ago) (2 children)

That's surprisingly accurate, as people here are highlighting (it makes geometrical sense when dealing with complex numbers).

My nephew once asked me this question. The way that I explained it was like this:

  • the friend of my friend is my friend; (+1)*(+1) = (+1)
  • the enemy of my friend is my enemy; (+1)*(-1) = (-1)
  • the friend of my enemy is my enemy; (-1)*(+1) = (-1)
  • the enemy of my enemy is my friend; (-1)*(-1) = (+1)

It's a different analogy but it makes intuitive sense, even for kids. And it works nice as mnemonic too.

[–] UnderpantsWeevil@lemmy.world 1 points 2 years ago

It’s a different analogy but it makes intuitive sense, even for kids.

Its good maths but terrible realpolitick.