- #1
Amaz1ng
- 42
- 0
Homework Statement
1 1 1 | 2
0 5 2 | 12
0 -4 8 | 0
Answer:
100 | -3
010 | 2
001 | 1
Homework Equations
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: