- #1
John777
- 27
- 1
Homework Statement
y''+4y = 2x^2+2sinx Find Y.
Homework Equations
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The Attempt at a Solution
Well I know the complimentary solution is Yc=C1e2ix+C2e-2ix
I am just very confused on finding the yp. I know the basic method is find yp then take second derivative and plug in, but I'm not sure what the initial equation is for yp thus I cannot proceed. If you answer this please don't just write the initial equation for yp. Please let me know how you got it. Thanks you guys are a lifesavers!
edit: I believe the form of yp is something like Ax^2+B+Dcosx-Esinx As this is just from another example I had, but I do not know how they got this.
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