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Homework Help: Gaussian elimination

  1. Oct 13, 2009 #1
    1. The problem statement, all variables and given/known data

    Hey everyone! I was handed this question in class without being taught how to do it! The text is supposed to be helpful but it is just confusing.

    Using Gaussian elimination and 3-digit rounding arithmetic, solve the following linear system:

    3.3330x_1 +15920x_2 +10.333x_3 = 7953
    2.2220x_1 +16.710x_2 +9.6120x_3 = 0.965
    -1.5611x_1 +5.1792x_2 -1.6855x_3 = 2.714

    I'm then supposed to compare it to the actual solutions of x_1 = 1, x_2 = 0.5 and x_3 = -1 but I believe I know how to do that. :)

    If there is anyway you can let me know how to do the above problem I'd really appreciate it! I want to learn this and the textbook is not clear at all.
  2. jcsd
  3. Oct 13, 2009 #2


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  4. Oct 13, 2009 #3


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    Note that the above link takes it a step further with Gauss-Jordan elimination.

    Just simply quit when you have reached the requirements for regular Gaussian elimination.
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