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September 21, 2014

September 21, 2014

Posted by **Anonymous** on Friday, August 29, 2008 at 12:57pm.

[3 2]*[-2

[4 5] [6]

1/7[3 2]*[-2]

[4 5] [6]

[5 -2]*[-2]

[-4 3] [6]

1/7[5 -4]*[-2]

[-2 3] [6]

could someone explain

- product matrix -
**Reiny**, Friday, August 29, 2008 at 1:11pmyour given system can be written in the following matrix form

[ 5-4]*[x]=[-2]

[-2 3] [y] [6]

the inverse of the first matrix is

1/17 of

[ 5-4]

[-2 3]

if you multiply the left side by that inverse you get the identity matrix

[1 0]

[0 1]

of course you would then also multiply the right side by that , so it looks like the last answer is the correct one

- product matrix (getting careless) -
**Reiny**, Friday, August 29, 2008 at 1:14pmoops!!

that first matrix of course should have been

[ 3 4]*[x]=[-2]

[ 2 5] [y] [6]

I copied incorrectly from my paper

- product matrix (getting careless) -

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