Use the method of undetermined coefficients to solve the differential equation.y'' + 6y' + 9y = 2e-x

A. y = C1e-3x + C2e3x + e-x
B. y = (C1 + C2x)e-3x - 1e-x
C. y = (C1 + C2x)e-3x + e-x
D. y = (C1 + C2x)e-3x + xe-x

Answer: C

Mathematics

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