Algebra - Printable Version +- Digiartists' Domain Community! (https://digiartistsdomain.org/phpboard) +-- Forum: The Lobby (https://digiartistsdomain.org/phpboard/forumdisplay.php?fid=50) +--- Forum: General Chat (https://digiartistsdomain.org/phpboard/forumdisplay.php?fid=2) +---- Forum: Help! (https://digiartistsdomain.org/phpboard/forumdisplay.php?fid=42) +---- Thread: Algebra (/showthread.php?tid=8019) Pages:
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Algebra - Kundral - 12-21-2008 I'm in grade 9 in Canada so I'm just in junior high... hat I'm asking is this... Can someone help me learn basic high school algebra because I'm very talanted in my current math... RE: Algebra - Crim - 12-21-2008 Brother, you just stepped in COMPLETELY the right place. Algebra is damn near my life-blood. How may I help you? RE: Algebra - Kundral - 12-21-2008 I want to learn how to do questions with more then one variable... RE: Algebra - Crim - 12-21-2008 An example, if you would. (Hell, this sounds like algebra two to me... dun-dun-dun) Wait, sounds like you're learning Substitution and Elimination, right? RE: Algebra - Kundral - 12-21-2008 ok random example... 2x-3y=8 x+2y=4 RE: Algebra - Erethzium - 12-21-2008 What are you trying to do? Solve for X or Y? Just giving us a problem won't help if you don't tell what you're trying to get out of the problem :P Sys. of ='s, duh. lol RE: Algebra - Kundral - 12-21-2008 2x-3y=8 x+2y=4 Solve for both X and Y RE: Algebra - Crim - 12-21-2008 Child, that's a system of equations, listen here. Equation 2 is almost perfect for the Substitution method. Subtract 2y from both said of that and you get x = -2y +4 Take that and replace it with the x in equation one; 2(-2y +4) - 3y = 8 Distributive property and solve for y; -4y - 3y + 8 = 8 y = 0 Take that and go to Equation 2; x + 2(0) = 4 Distribute and solve for x; x + 0 = 4 x = 4 Now put both back in equation 1 to check them 2(4) - 3(0) = 8 8 = 8 Therefore, correct Kundral received Substitution Method *DO-DA-DO* I'll post Elimination in a minute EliminaTION! Equation 2, yet again, is almost perfect for elimination Multiply Equation 2 by -2 giving you -2x + 4y = -8 You know have that and Equation 1, add the two equations together and you knock out x y = 4 Take that y put it in equation 1, solve for x, take x and y put it in equation 2 to check your work Kundral received EliminaTION Method *DO-DA-DO* RE: Algebra - Bee - 12-21-2008 Best advice I can give you: purchase a Texas Instruments model Ti-83, Ti-84, or Ti-89 graphing calculator. They're a bit expensive(~$80-$100 when I bought mine), but, it'll save your ass time and time again. Algebra, Geometry, Calculus, Math Models if you're a dumbass like me, it can do it all! They even have games for them! Seriously, buy yourself a good graphing calculator. Most schools allow the use of them during class, my old school even provided the entire class with one for use in-class(if you wanted to use one for homework, you had to buy your own, or apply for one from the school). If money is a problem, you can get a Ti-72 or Ti-73. Older model, not as many features, but, they can still prove vital. RE: Algebra - DragonMasterX - 12-22-2008 My calculator could never do such things unfortunately, but now that I look back I'm glad it never did allow me to, or I'd be unable to do such a simplicity compared to the stuff they teach at Math I at college. Then again, I never did need them, I learned Substitution and Elimination really fast. And since we're on the topic, I gotta hand it to you Crim, I wouldn't have been able to explain the two methods with so much patience! |