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I have this problem:

Use the method of undetermined coefficients to find one solution of

y'' + 2y' - 7y = [(-1t^2)+4t+7]e^(2t).

Find a specific solution, not a general one.

I'm having lots of trouble finding the coefficients.

I'm assuming I need to use [(At^2)+Bt+C]*e^(2t).

This however does not seem to work. Can anyone confirm this as the function I need to use for differentiation?

Thank you.

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# Homework Help: Quick help with ODE

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