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Homework Help: Gaussian elimination

  1. Sep 1, 2005 #1
    2 1 1 | 4
    -1 2 1 | 3
    7 6 5 | 19

    Need a little help please
     
  2. jcsd
  3. Sep 1, 2005 #2
    Im not going to do the whole thing, but I like to try and eliminate the stuff below the top left number first.

    Say, R3+7R2, will get rid of the -7. And will make the bottom row 0 20 12 | 40, id then divide by 2. Makes things easier. Then move onto another number.

    I used to really suck at this, it takes a lot of goes before you can do it without trouble.
     
  4. Sep 1, 2005 #3
    Im not going to do the whole thing, but I like to try and eliminate the stuff below the top left number first.

    Say, R3+7R2, will get rid of the -7. And will make the bottom row 0 20 12 | 40, id then divide by 2. Makes things easier. Then move onto another number.

    I used to really suck at this, it takes a lot of goes before you can do it without trouble.
     
  5. Sep 1, 2005 #4
    Thank you, the book doesn't explain to good and I just needed a jump start.
     
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