I tried doing this problem soooo many times for several days and keep failing and then I'm so worn out I can't keep thinking straight and I can't move on because of this! I'm attaching my work and it would be great if I can get back and forth feedback if necessary to find my mistake(s).(adsbygoogle = window.adsbygoogle || []).push({});

The question is:

"Solve the initial value problem: y'' + 18y' + 90y = -6e^(-9t) cos(2t); y(0) = 3, y'(0) = -1"

Any help would be GREATLY appreciated!

Thanks in advance!

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# Laplace Transform of this Differential Equation

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