this post was submitted on 23 Nov 2024
232 points (96.8% liked)

Math Memes

1156 readers
396 users here now

Memes related to mathematics.

Rules:
1: Memes must be related to mathematics in some way.
2: No bigotry of any kind.

founded 1 year ago
MODERATORS
 
top 22 comments
sorted by: hot top controversial new old
[–] the_tab_key 3 points 53 minutes ago

Even if the x-x term didn't exist, the equation is already simplified (fully factored) so there is nothing to do anyway.

[–] [email protected] 19 points 9 hours ago

Fun fact, omitting the (x-x) zero term and expanding the entire polynomial, you'd get something with 2^25 = 33,554,432 terms. May be slightly excessive!

[–] [email protected] 123 points 22 hours ago (1 children)

For those of you who were confused even after reading the comments: (a)(b) basically means a*b. My mind just didn't connect that to the fact that (x-x)=0. in the (a-x)(b-x) stuff is also (x-x) which = 0, and anything * 0 = 0, so no matter the value of literally everything else in the equation, it all equals out to 0 because every single () will get multiplied by (x-x), which is 0. There, hopefully that will clear it up for anyone remaining lost. And like all good jokes, they are always best when you have to explain them.

[–] [email protected] 2 points 1 hour ago (1 children)

(a)(b) basically means a*b

Ok, wtf. Why write it like this then?

[–] [email protected] 7 points 1 hour ago

To make sure what's inside the brackets is resolved internally before they're multiplied with each other.

 (a)  (b)   =   a * b  
(a+1)(b+1) =/= a+1*b+1
[–] [email protected] 73 points 23 hours ago (1 children)

For those that struggled like me…

Going from a-z, write out the last three multiplicands.

[–] [email protected] 41 points 23 hours ago
[–] disguy_ovahea 31 points 23 hours ago (2 children)

This was impossible to answer prior to 3 BC.

[–] [email protected] 12 points 19 hours ago

Unless you were Mayan. They had a concept of zero, or so I heard. But they lacked the letters, a-z and the parentheses :p

[–] [email protected] 1 points 20 hours ago (2 children)
[–] [email protected] 23 points 20 hours ago (1 children)

0 wasn’t invented yet.

Mesopotamians invented it because year 0 was approaching, so there was a dire need to represent such number.

[–] [email protected] 1 points 2 hours ago

TIL they had ghost concerts back then

[–] disguy_ovahea 4 points 20 hours ago (1 children)

That’s when the number 0 was introduced in India.

[–] [email protected] 3 points 19 hours ago

Ah, I forgot zero was so recent.

[–] [email protected] 11 points 23 hours ago (1 children)
[–] [email protected] 57 points 23 hours ago (2 children)

0

There’s an (x - x) in there

[–] copd 3 points 7 hours ago* (last edited 7 hours ago) (1 children)

Technically there is a (x - 𝑥) in there. U+1D465 != x so this post is a little meh

[–] [email protected] 4 points 2 hours ago (1 children)

Mathematicians do weird stuff to get more letters, but I've never seen anyone use x and 𝑥 for different things

[–] joshthewaster 1 points 48 minutes ago

They also wouldn't want to be ambiguous. If I was trying to write this problem the a, b, c... would get replaced by something like a_1, a_2,..., a_26 to be clearer. This problem works as a fun gotcha but isn't something that would come up in the real world.

[–] [email protected] 5 points 23 hours ago
[–] [email protected] 5 points 23 hours ago
[–] [email protected] 1 points 23 hours ago

Now I want pie.