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dy(t)/dt + 3y(t) = x(t-2), t > 0 and y(0) = 0

i did it by parameterization but am unsure if it is correct. i need help especially with the limits of integration.

y' + 3y = x(t-2)

y

_{h}' = -3y

_{h}

y

_{h}= Ce^-3t

y(t) = v(t)e^-3t

(ve^-3t)' = v'e^-3t - 3ve^-3t

-3ve^-3t + v'e^-3t = -3ve^-3t + x(t-2)

v' = e^3t * x(t-2)

v = int[e^3t * x(t-2) dt] // int means integral

y(t) = e^-3t * int[e^3T * x(T-2) dT] // T is tau

i'm not sure if that's correct. right now i have the limits of integration set to 0 to t

thanks in advance