SIMULTANEOUS+EQUATIONS+with+matrices

**DOU YOU LIKE MY LOGO????** You can solve most simultaneous equations ( two or more equations that //x// or //y// e.t.c equals the same thing for every equation) using matrices

However, it isn't any easier (especially with 3+ unknowns)

Take the simultaneous equations

3x-4y=6 5x+y= 20.5

Using the matrices, you could work out that //x//= 4 and //y//= 0.5 To work this out using matrices, open this file...

HOWEVER, before you open this file, you need to know A)how to find the inverse of 2x2 matrices B) how to multiply matrices together. I am trying to find out whether you can solve quadratic simultaneous equations using matrices (I have my doubts)

If so, can you solve cubic? Anyway, they aren't too difficult to work out normally! UPDATE 19:16 16/6/11

I have found a different way to solve simultaneous equations with matrices. Also, it appears a lot simpler. However, I cannot get the images to work so here is the link

[|Simultaneous Equations using matrices] Still no luck on quadratic simultaneous.

I have tried working out a quadratic simultaneous equation using the method shown in the powerpoint. The results proved unsuccesful, well, it got the //y// part right!