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Homework Help: System of Equations Help

  1. Feb 17, 2009 #1
    Hello. I'm trying to solve a system of equations problem (for my Partial Fraction Decomposition problem)...

    1 = -4 + 2B + 2C + D + E
    3 = 4 - 2B + 2C - D + E
    3 = -25 + 20B + 10C + 4D + 2E
    5 = 25 - 20B + 10C - 4D + 2E

    So that boils down to..

    1 = 2C + E
    3 = 2C + E
    3 = 10C + 2E
    5 = 10C + 2E
    right??

    I tried substitution, but that didn't work. Elimination doesn't work, either... So what else? I'm pretty sure you can do it graphically, but I can't remember...

    Help, please! I'm doing this last minute (I know I shouldn't be, but I desperately need help!)
     
  2. jcsd
  3. Feb 18, 2009 #2
    Something is not right here.

    if you multiply your first equation by 5, you get: 5 = 10C + 5E

    but your last equation is: 5 = 10C + 2E

    So which is it? I think you may have made a mistake somewhere coming up with these equations.
     
  4. Feb 18, 2009 #3

    HallsofIvy

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    Science Advisor

    What was the original "partial fractions" problem?
     
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