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help with systems of diff. eq

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Date Posted: 7/23/2008 9:56:37 PM  Status: Live
help with systems of diff. eq
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Question Details:
can anybody tell me how to solve:    x' = -x + y
                                                       y' = -4x - y
 
using eigen values/vectors.  I know that you will get non-real values but am not sure how to finish the problem and write it in the correct form. 
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Date Posted: 7/25/2008 7:37:48 AM  Status: Live
Asker's Rating: Lifesaver   
Response:
dsh9q3's Comment:
Thanks!
:)



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