/sci/ - Science & Math » Thread #12566903

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Anonymous Mon 11 Jan 01:56:19 2021 No.12566903 View Reply Original Report

Quoted By: >>12566905 >>12566910 >>12566921 >>12567175 >>12567242 >>12567489 >>12568444 >>12570854

Two negative numbers multiplied together results in a positive number. How many mathematicians or practitioners of math (the entirety of the first world) could, if asked, explain why?

Anonymous

Anonymous Mon 11 Jan 2021 01:57:26 No.12566905 Report

Quoted By:

>>12566903
All of them.
btw, high school teachers and undergrads are not mathematicians.

Anonymous

Anonymous Mon 11 Jan 2021 01:59:21 No.12566910 Report

Quoted By:

>>12566903
Two wrongs don't make a right, but one wrong multiplied by another wrong does.

Anonymous

Anonymous Mon 11 Jan 2021 02:06:08 No.12566921 Report

Quoted By: >>12567007 >>12567193 >>12567248 >>12572575

>>12566903
Let a and b be positive

(a-a)(-b) = 0
(a)(-b)+(-a)(-b) = 0
-ab+(-a)(-b) = 0
(-a)(-b) = ab

QED

Anonymous

Anonymous Mon 11 Jan 2021 02:49:40 No.12567007 Report

Quoted By: >>12567054 >>12567055 >>12567216 >>12570818

>>12566921
I dont have two candies, my bro also doesnt have two candies, we team up, multiply it, boom, now we do have four candies. shiiiiets good

Anonymous

Anonymous Mon 11 Jan 2021 03:10:43 No.12567054 Report

Quoted By:

>>12567007
Not having two candies is not analogous to -2, and multiplying candies is meaningless.

Anonymous

Anonymous Mon 11 Jan 2021 03:11:37 No.12567055 Report

Quoted By:

>>12567007
you must be 18 to post here

Anonymous

Anonymous Mon 11 Jan 2021 03:45:25 No.12567175 Report

Quoted By:

>>12566903
What else would a negative amount of negativity be but positive?

Anonymous

Anonymous Mon 11 Jan 2021 03:51:00 No.12567193 Report

Quoted By: >>12567224

>>12566921
Never in a million years would I have figured that out

Anonymous

Anonymous Mon 11 Jan 2021 03:56:39 No.12567216 Report

Quoted By: >>12567223 >>12567641

>>12567007
Its more like, you owe Bob 2 candies
and your bro owes bob 3 candies for every candy you owe
So how many Candies is owed to Bob?

Anonymous

Anonymous Mon 11 Jan 2021 03:59:19 No.12567223 Report

Quoted By: >>12567230 >>12567261

>>12567216
8?

Anonymous

Anonymous Mon 11 Jan 2021 03:59:48 No.12567224 Report

Quoted By: >>12567244

>>12567193
Then you don't belong on this board and need to get the fuck out

Anonymous

Anonymous Mon 11 Jan 2021 04:01:21 No.12567230 Report

Quoted By:

>>12567223
Good job.
Everyone lets press C so we can clap for anon.
C

Anonymous

Anonymous Mon 11 Jan 2021 04:04:45 No.12567242 Report

Quoted By: >>12567243

>>12566903
multiplication is just repeated addition
so multiplication of negative numbers is just repeated subtraction

so -4 * -4 = -4 - -4 - -4 - -4

Anonymous

Anonymous Mon 11 Jan 2021 04:06:48 No.12567243 Report

Quoted By: >>12567767

>>12567242
what
how are people on /sci/ failing 3rd grade math today

Anonymous

Anonymous Mon 11 Jan 2021 04:08:57 No.12567244 Report

Quoted By:

>>12567224
Naw, I'll stay here

Anonymous

Anonymous Mon 11 Jan 2021 04:10:40 No.12567248 Report

Quoted By: >>12567281

>>12566921
This assumes a negative number times zero is zero

Anonymous

Anonymous Mon 11 Jan 2021 04:15:35 No.12567261 Report

Quoted By:

>>12567223
Based retard

Anonymous

Anonymous Mon 11 Jan 2021 04:21:23 No.12567281 Report

Quoted By: >>12567292

>>12567248
Any number multiplied by zero is zero. You can call it -0 if you want but it changes nothing.

Anonymous

Anonymous Mon 11 Jan 2021 04:28:10 No.12567292 Report

Quoted By: >>12567473 >>12570261

>>12567281
I don't believe you, you have to prove it first

Anonymous

Anonymous Mon 11 Jan 2021 06:15:01 No.12567473 Report

Quoted By: >>12567710 >>12570269 >>12570833

>>12567292
Let a be a positive number
a * 0 = 0 (if you say otherwise you're a fag)
-a* 0 = (-1)*(a*0)
-a*0 = (-1) * 0
-a*0=0

Anonymous

Anonymous Mon 11 Jan 2021 06:30:23 No.12567489 Report

Quoted By:

>>12566903
a, b>0
a-a=0
(-b)*(a-a)=0*(-b)
-ab -(a)(-b)=0
(-a)(-b)=ab
QED

Anonymous

Anonymous Mon 11 Jan 2021 08:06:42 No.12567641 Report

Quoted By:

>>12567216
>debt analogy
this, for all negative numbers
negative numbers are ALL debts relative to some zero. there is no 'negative' in nature, only the absence of a thing (zero).
positive and negative are not mutually-neutralizing active substances

Anonymous

Anonymous Mon 11 Jan 2021 08:44:30 No.12567710 Report

Quoted By: >>12567885

>>12567473
0 is undefined

Anonymous

Anonymous Mon 11 Jan 2021 09:05:11 No.12567767 Report

Quoted By:

>>12567243
how is it different from any other day?

Anonymous

Anonymous Mon 11 Jan 2021 09:42:55 No.12567885 Report

Quoted By: >>12569643

>>12567710
It is additive identity of ring of integers . Look up Peano axioms retard

Anonymous

Anonymous Mon 11 Jan 2021 12:45:04 No.12568400 Report

Quoted By:

If you remove debt, you gain

Anonymous

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Anonymous Mon 11 Jan 2021 13:15:44 No.12568444 Report

Quoted By: >>12569345 >>12570265

>>12566903
Because... because... because... because... because... because... because... because... because... because... because... because... because... because... because... because... because... because... because... because... because... because... because... because... because... THEY JUST ARE OKAY?!

Anonymous

Anonymous Mon 11 Jan 2021 18:48:20 No.12569345 Report

Quoted By:

>>12568444
this but unironically
ultimately because it's an arbitrary rule of the grammar of math as a language. because 'negative' does not exist in nature. the concept of 'negative' is an invented tool. presumably arising from social concepts of debt (of some type of currency), originally.

Anonymous

Anonymous Mon 11 Jan 2021 20:11:58 No.12569643 Report

Quoted By:

>>12567885
it's reciprocal is undefined.
Stop sucking off your masters and use your brain for two seconds.
"Mostly defined" is just a weasel way of saying "undefined."

Anonymous

Anonymous Mon 11 Jan 2021 22:09:41 No.12570261 Report

Quoted By: >>12570273

>>12567292
0*b = (a-a)b = ab - ab = 0
Therefore 0*b = 0

Anonymous

Anonymous Mon 11 Jan 2021 22:11:25 No.12570265 Report

Quoted By:

>>12568444
At a certain point you hit mathematical bedrock.

Anonymous

Anonymous Mon 11 Jan 2021 22:13:07 No.12570269 Report

Quoted By: >>12570273

>>12567473
How do you know -1 * 0 is 0?

Anonymous

Anonymous Mon 11 Jan 2021 22:14:21 No.12570273 Report

Quoted By:

>>12570269
>>12570261
This anon gave a simple elegant solution.

Anonymous

Anonymous Tue 12 Jan 2021 00:55:44 No.12570818 Report

Quoted By:

>>12567007
teamwerk makes the dreamwerk
concsciousness is free energy

Anonymous

Anonymous Tue 12 Jan 2021 01:00:18 No.12570833 Report

Quoted By:

>>12567473
let A be like weed man then solve it

Anonymous

Anonymous Tue 12 Jan 2021 01:06:28 No.12570854 Report

Quoted By:

>>12566903
cause wen u combine 2 lines symmetrically u get a cross

Anonymous

Anonymous Tue 12 Jan 2021 01:11:51 No.12570867 Report

Quoted By:

Field
Inverse element exists
Inverse of inverse is original again
Etc etc
I can haz 300k starting nao?

Anonymous

Anonymous Tue 12 Jan 2021 15:24:15 No.12572575 Report

Quoted By: >>12572781

>>12566921
You're just rearranging variables. Proving nothing.

Anonymous

Anonymous Tue 12 Jan 2021 16:51:48 No.12572781 Report

Quoted By:

>>12572575
retard

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