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Matrix multiplication, specifically elimination matrices.

  1. Aug 5, 2013 #1
    I was wondering if anybody can see where I have gone wrong here?
    I was given the rule, E2(E1A1)=(E2E1)A1, I can't seem to find my mistake. ImageUploadedByPhysics Forums1375728851.535927.jpg
     
  2. jcsd
  3. Aug 5, 2013 #2

    tiny-tim

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    Hi AJBMuir! :smile:
    Your (E2E1)A is wrong …

    eg the top-right should be 4 -2 + 2 :wink:
     
  4. Aug 5, 2013 #3
    Cheers, I have no idea how I missed that!
     
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