(D^2+D)y=-cosx

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Solution for (D^2+D)y=-cosx equation: 


Simplifying
(D2 + D) * y = -1cosx

Reorder the terms:
(D + D2) * y = -1cosx

Reorder the terms for easier multiplication:
y(D + D2) = -1cosx
(D * y + D2 * y) = -1cosx
(yD + yD2) = -1cosx

Solving
yD + yD2 = -1cosx

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Reorder the terms:
cosx + yD + yD2 = -1cosx + cosx

Combine like terms: -1cosx + cosx = 0
cosx + yD + yD2 = 0

The solution to this equation could not be determined.

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