Solve the differential equation by variation of parameters, subject to the initial conditions y(0) = y(x) = y" + 2y' - -8y = 4e7 7 2x 9 + -2x 11 -4x 8 e - e-x + 1 -X e 1 -e 2 -2x 1, y'(0) = 0.

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