/sci/ - Science & Math » Thread #13040606

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math brainlet here

Anonymous Tue 27 Apr 17:19:15 2021 No.13040606 View Reply Original Report

Quoted By: >>13040625 >>13040652 >>13040773

can someone please explain to me how 1-x becomes -(x-1)? thnx

Anonymous

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Anonymous Tue 27 Apr 2021 17:21:55 No.13040625 Report

Quoted By:

>>13040606
Not him but also: is there a list of books, guides, mooc, online shit to level up in maths? from the highschool basics to big boy soi-ence ?

Anonymous

Anonymous Tue 27 Apr 2021 17:23:17 No.13040633 Report

Quoted By: >>13040644

uh, distribute the -1
this is basic arithmetic

Anonymous

Anonymous Tue 27 Apr 2021 17:25:00 No.13040644 Report

Quoted By: >>13040680

>>13040633
>this is basic arithmetic
How can you train your brain to get the reflexes to do that? you know it's like the pic/test where you have to think and visualize and apple and some people can't

Anonymous

Anonymous Tue 27 Apr 2021 17:26:36 No.13040652 Report

Quoted By: >>13040680 >>13040715

>>13040606
$1-x = 1\cdot (1-x) = [(-1)\cdot(-1)]\cdot(1-x) = (-1)\cdot[(-1)\cdot (1-x)] = (-1)\cdot(-1+x) = - (-1 + x) = - (x-1)$

Anonymous

Anonymous Tue 27 Apr 2021 17:29:59 No.13040680 Report

Quoted By:

>>13040652
fucking lmao
>>13040644
by doing problems, obviously

Anonymous

Anonymous Tue 27 Apr 2021 17:37:50 No.13040715 Report

Quoted By: >>13040838

>>13040652
reminds me of 1st year math at uni where you have to prove that 1-1 = -1+1 or whatever lmao

Anonymous

Anonymous Tue 27 Apr 2021 17:49:32 No.13040773 Report

Quoted By:

>>13040606
1 - x.
>flip it
x - 1
>x - 1 is obviously not the same as 1 - x because you've flipped it.
>prefix x - 1 it with a - sign and it becomes the same as 1 - x.
1 - x = -(x - 1)

Elon Musk Fanboy

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Elon Musk Fanboy Tue 27 Apr 2021 18:07:37 No.13040838 Report

Quoted By: >>13040913

>>13040715
That shit is dumb af, like starting from the axioms you have to prove $a + 0 = b + 0$ iff $a = b$ , do mathfags really?

Anonymous

Anonymous Tue 27 Apr 2021 18:11:42 No.13040853 Report

Quoted By:

1-x = - -(1-x)= - (-1--x) = - (-1+x) = - (x-1)
have a nice day

Anonymous

Anonymous Tue 27 Apr 2021 18:28:33 No.13040913 Report

Quoted By:

>>13040838
Yeah it's dumb until multiplication is no longer commutative.

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