Community > General Discussion

Topic: Basic Algebra
Suzanne20 Joined Thu 11/15/07 Posts: 9261	Wed 01/02/08 08:44 PM
suzanne, Ahh! It's the old BIDMAS thing, yeah? B rackets I ndices D ivision M ultiplication A ddition S ubtraction ooooh..never heard of it

katrina_4888 Joined Fri 05/04/07 Posts: 1755	Wed 01/02/08 08:44 PM
me neither!

Suzanne20 Joined Thu 11/15/07 Posts: 9261	Wed 01/02/08 08:45 PM
ok i feel stupid now..what are indices?

Suzanne20 Joined Thu 11/15/07 Posts: 9261	Wed 01/02/08 08:45 PM
me neither! glad im not alone!

daniel48706 Joined Fri 03/16/07 Posts: 8566	Wed 01/02/08 08:45 PM
I still want o know how to add one plus one in order to get zero... lmao. I have seen it done several times, but to this day do not understand how to do it

Suzanne20 Joined Thu 11/15/07 Posts: 9261	Wed 01/02/08 08:46 PM
i know 1+(-1)=0 but never seen 1+1=0

geektothetenth Joined Sat 11/17/07 Posts: 880	Wed 01/02/08 08:47 PM
I'd guess indices are what they call exponents, I've never heard them called that before though. I learned PEMDAS instead of brackets we called them parantheses, then exponents, multiplication/division, addition/subtraction.

andreajayne Joined Mon 09/24/07 Posts: 8202	Wed 01/02/08 08:49 PM
you guys lost me on those, i just think i remember how to do all that stuff, i dont remember the technical names or anything!

Suzanne20 Joined Thu 11/15/07 Posts: 9261	Wed 01/02/08 08:49 PM
yeah brackets function a little differently than parentheses but i dont quite know how to explain it

beachdog50 Joined Sun 04/15/07 Posts: 832	Wed 01/02/08 08:53 PM
I am curious to see how many people can (assuming they are willing t do so) answer these next five questions. They are basic algebra equations that can be found in most if not all highschool algebra books. 1. (5+2) x (5+2) = 2. 2(5+2) x (5+2) = 3. 21B + 21A = -2B - 20A (SIMPLIFY DOWN) 4. A + B + C = 21 IF A IS EQUAL TO 7 AND B IS EQUAL TO 10, WHAT IS C? FOR THE LAST QUESTION, X=57 3X + 2X = 285 true or false I'm curious do you have a final in math coming up?

daniel48706 Joined Fri 03/16/07 Posts: 8566	Wed 01/02/08 09:28 PM
yeah brackets function a little differently than parentheses but i dont quite know how to explain it I could be wrong but I believe brackets indicate a real number versus an unreal number. now don't ask me the differance, lol cause I never DID learn...

daniel48706 Joined Fri 03/16/07 Posts: 8566	Wed 01/02/08 09:30 PM
no no math test, lol. This posting was in response to the fact that I got aggravated earlier and posted about how the united states needs to spend more on education, cause kids were graduating highschool unablto read or do basic algebra. So I put this up as a test to see who could do the very basic algebra (and promptly showed my ignorance by mistyping the third equation by accident, lmao)

geektothetenth Joined Sat 11/17/07 Posts: 880	Wed 01/02/08 11:42 PM
Sometimes brackets like [] are used in algebra to make the equation more clear instead of nesting a bunch of parentheses. The other time I've seen them is in linear algebra to indicate a matrix. I never took linear algebra, I stopped taking math at Calculus 2. I had a suite mate in college who was a physics and biochem double major so he had to take linear algebra and discrete mathematics. He was a drunk pothead but ended up with a 3.9 and was a hilarious kid.

WhiteSox0507 Joined Wed 09/26/07 Posts: 473	Wed 01/02/08 11:49 PM Edited by WhiteSox0507 on Wed 01/02/08 11:51 PM
1. (5+2) x (5+2) = 49 2. 2(5+2) x (5+2) = 98 3. 21B + 21A = -2B - 20A (SIMPLIFY DOWN) : 23B = -41A 4. A + B + C = 21 IF A IS EQUAL TO 7 AND B IS EQUAL TO 10, WHAT IS C? : C = 4 FOR THE LAST QUESTION, X=57 3X + 2X = 285 true or false : True. That was easy. Got anything else?