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Finding C and D is called partial fraction decomposition. See an example here and also in section Examples on the same page.
You can do that simply by adding the fractions as indicated:
Do you see that you must have C+ D= 4 and 8C- 3D= -23?
Surely you see that ?
Last edited by HallsofIvy; November 13th 2013 at 08:54 AM.
Edit: HallsofIvy corrected the post, so this one is unnecessary.
Last edited by SlipEternal; November 13th 2013 at 08:52 AM.
Just before I did! Thanks.
Although I don't think I got it completely corrected until after you removed your correction!
Last edited by HallsofIvy; November 13th 2013 at 08:55 AM.