SOLUTION: hi how do you solve a system of equations using a matrix when the matrix isn't square? For example: 4x-y=2 2x+2y=1 4x-5y=3 ?

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Question 594623: hi how do you solve a system of equations using a matrix when the matrix isn't square?
For example:
4x-y=2
2x+2y=1
4x-5y=3
?

Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
hi how do you solve a system of equations using a matrix when the matrix isn't square?
For example:
4x-y=2
2x+2y=1
4x-5y=3
------------
In general, you can't.
You can pick any 2 of the 3 eqns and find a solution. The 3rd eqn might not fit.

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