y''+6y'+9y = e^(-3x)/X^3 I don't know what to do when b^2-4ac is zero. When I do the Wronskien matrix I can't solve for C1 and C2 cause my y1 and y2 are the same: x^2 + 6x + 9 = 0 delta = 0 Y(x) = c1e^-3x + c2e^-3x Can anyone help?
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Originally Posted by Provoke y''+6y'+9y = e^(-3x)/X^3 I don't know what to do when b^2-4ac is zero. When I do the Wronskien matrix I can't solve for C1 and C2 cause my y1 and y2 are the same: x^2 + 6x + 9 = 0 delta = 0 Y(x) = c1e^-3x + c2e^-3x Can anyone help? , since you have repeated roots.
Originally Posted by Chris L T521 , since you have repeated roots. Ahhh! Tickle me with a feather lol, thanks alot man!
Last edited by mr fantastic; Nov 26th 2009 at 03:26 AM.
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