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9.21, §2 Solution

y'' + 2 y' + 2 y = 0

Characteristic polynomial:

General solution:

y = C1 e(-1+i)x + C2 e(-1-i)x

Cleanup of complex exponentials is required in this class:

Euler:

Cleaned up solution:

Up: 9.21 Previous: 9.21, §1 Asked