I know there is a way, but not sure of how it goes, but i have heard of a way you can use a matrix to solve simultaneous equations. Is this right? and if so, how?? (I'm only in yr 10, so keep the Matrix terminology not too complex :D )
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I know there is a way, but not sure of how it goes, but i have heard of a way you can use a matrix to solve simultaneous equations. Is this right? and if so, how?? (I'm only in yr 10, so keep the Matrix terminology not too complex :D )
trough gausselimination of a matrix. Not too simple to explain but basically you subtract a multiple of another row in order to eliminate all but the diagonal (this also means you permutate a row), sometimes you need to switch the rows as well. There's a lot of stuff to read on the net, just search on gausselimination.
You can also use matrix inversion to solve simultaneous equations.
Inverting a matrix requires more computations than solving a set of simultaneous equations. Once you have the inverse, you still have more work to do.
There is at least one thread at this forum which describes gauss elimination. I think it includes some code.
Thankyou all for your help. I think i'll just search gauss elimination.
Wow, i never realised, but on my Calc (Ti83+), there is an 'rref(matrix)' button, which does it all for you!! COOL!!!