(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

1 1 1 | 2

0 5 2 | 12

0 -4 8 | 0

Answer:

100 | -3

010 | 2

001 | 1

2. Relevant equations

3. The attempt at a solution

How did they get the answer? I went over how to do 2x2 w/ someone but 3x3 seems different.

Basically this is how I'm thinking to do it:

Find position 1 which is 1 so don't do anything.

Go to position 2 which is 0, so good.

Go to three 0, so good.

Go to position 4, which is 5. Multiply the entire row with that 5 by the reciprocol of 5 (1/5).

Go to position 5 which is -4, needs to be 0. Multiply the first row by 4 then add that result to the row with the 4 in it. So basically: 4(Row1) + Row2 -> New Row 2

Then pretty much repeat with 8, then 2, then 1, then 1...remembering that

1. To get a 1, multiply by the reciprocal.

2. To get a 0 in row 2 in a position that has a 3, for example: -3(row 1) + row 2 => row 2

I'm not getting the right answer though. D:

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# Matrix Redux

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