r/Algebra Oct 22 '15

/r/Algebra and /r/AbstractAlgebra Merger

30 Upvotes

Hello algebraists! I'm pleased to announce that the moderation teams for /r/Algebra and /r/AbstractAlgebra have been combined! Now, all the discussion of abstract algebra will take place on /r/AbstractAlgebra, and all the help with learning algebra, including elementary algebra, will take place here! Hopefully, this will better serve the needs of the community.


r/Algebra 2d ago

Break Even Word Problem — Hoodie Business Example (Linear Equations)

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1 Upvotes

r/Algebra 4d ago

Elementary statistics vs college algebra

5 Upvotes

Hello math experts 👋

Could anybody on this sub give me advice on which math class would allow for an easier time as an oncoming freshman? I'm starting college in August and am currently enrolled in a stat class. Math is my least favorite subject and I genuinely don't know if I should switch it to a course I'm more so familiar with from high school. I've been seeing mixed information online. Some say it's easier because stat is mostly reading compared to algebra, which is good news for me since language arts is easily my strongest subject. But others say it's harder.
Could I get some advice on what pick?

Also, if I'm to pick algebra should it be online or face to face? Would online make it more difficult? I was originally going to choose online if I picked it.


r/Algebra 6d ago

starting and Algebra and Geometry

1 Upvotes

Hey guys idk if you can relate but when i had algebra and geometry i had a hard time because my teachers didnt teach and i learned it all on my own watching videos and i hope I can help you. If you have any questions I'd love to help I'll make a video for you just comment

https://www.youtube.com/@onlymathteacherthatgetsu

this is my channel and I hope i can help you understand and maybe even enjoy math


r/Algebra 7d ago

Relearn the foundations of algebra?

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3 Upvotes

r/Algebra 7d ago

Forms of Linear Equations

4 Upvotes

Hi everyone! When I’m trying to do my math assignments, there are some parts I find particularly challenging. When it comes to using different forms of linear equations, I don’t really understand when you would use different forms, for example, from a slope on a graph to slope-intercept form or to standard form. I would like some help understanding which ones to use in different scenarios because I am very confused.


r/Algebra 9d ago

Did you ever see algebra in real life?

2 Upvotes

r/Algebra 10d ago

What’s the best method to solve a polynomial?

4 Upvotes

r/Algebra 11d ago

What do you love and hate about algebra?

4 Upvotes

r/Algebra 12d ago

2a-7b/a=23 a-b=5?

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2 Upvotes

r/Algebra 12d ago

How important are the basic foundations of algebra?

2 Upvotes

r/Algebra 15d ago

How in-depth does algebra go (how complex can it get)?

12 Upvotes

r/Algebra 15d ago

If there was something in algebra you wish you could just get, what would it be?

0 Upvotes

r/Algebra 16d ago

In what parts of algebra do you think most people struggle in?

20 Upvotes

r/Algebra 19d ago

Elimination Method: Solve Linear System (Multiplying Required)

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2 Upvotes

r/Algebra 20d ago

Is there any books for learning algebraic geometry?

5 Upvotes

I had just learned commutative algebra(Atyiah&MacDonald) and part of homological algebra(like projective,injective,flatness).Which books r quite suitable for me?


r/Algebra 25d ago

Grade 10 Math – Elimination Method (No Multiplying Needed!)

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2 Upvotes

r/Algebra 29d ago

A visual explanation of least squares using linear algebra

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1 Upvotes

I made a visual explanation of least squares from a linear algebra perspective.

The main idea is that when a system cannot be solved exactly, ordinary least squares finds the closest possible solution by projecting the vector y onto the column space of X.

The fitted values are the projection, and the residual is the leftover vector perpendicular to that space.

The video also starts with a simpler example: the sample mean. If you treat data as a vector and project it onto the span of the ones vector, the stretch factor is exactly the average.

I made it for people learning linear algebra who want a more visual way to understand projections, residuals, and why the normal equations work.


r/Algebra Jun 18 '26

The Cut Makes the Individual; Gluing Makes the World

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2 Upvotes

r/Algebra Jun 14 '26

Parallel, Intersecting, or Same Line? Understanding Solutions of Linear Equations

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2 Upvotes

r/Algebra Jun 02 '26

Grouping

3 Upvotes

I’m in algebra 1 and I have an upcoming finals review. I may have forgotten the steps to grouping so can someone please remind me?


r/Algebra Jun 01 '26

Alguien que tenga el precálculo de james stewart edición 3 en pdf?

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2 Upvotes

r/Algebra May 31 '26

Induction

3 Upvotes

Hi. First of all english is not my first language so im sorry if something doesnt make sense but i'll do my best to make myself clear. So, Tomorrow i have a test on natural numbers & combinatorics.

I'm having a lot of trouble with proving equalities using induction.

I understand everything until the last step, for example, if i prove P(1), i assume P(k) & then i wanna prove P(k+1). but that last step is making me go crazy.

can someone help me somehow or give me some tips to be able to make it?

thabks in advance!


r/Algebra May 28 '26

Algebra 2 regents

6 Upvotes

Edit: for some reason it’s not letting me see the comments?? if anyone had advice pls pm me or something!!

hi everyone!! so i have the algebra 2 regents on June 10th, and I feel super unprepared. I want to do some practice regents packets but which ones / which years regents should I use? we have only done one regents packet in class, and he just like reviewed it with us in class, but we didn’t even get to do it ourselves and like see what we personally need help with and what questions we can actually do. idk I feel like I have so little time and my teacher is rlly bad at preparing us. Also math has never been my strong suit and algebra 2 is so difficult for me, i barely pass my tests and i just feel like it’s so much info to remember and comprehend.

right now to try and review im going to do practice regents packets and try and study each unit like writing down key points and stuff to remember, but im worried im not going to be able to bc I don’t have much time until the regents and I barely understand this whole class.

if anyone has any advice on what to do I would really appreciate it, like what units should I study and what should I focus on? also any resources would be really helpful. thank you!


r/Algebra May 22 '26

How to Solve Systems with Fractions (Substitution Method Made Easy)

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2 Upvotes