The general solution of the differential equation of Y '+ y = e ^ (2x)

The general solution of the differential equation of Y '+ y = e ^ (2x)

Applying formula method
y'+P(x)y=Q(x)
P(x)=1 ,Q(x)=e^2x
y=∫Q(x)*[ e^∫P(x)dx ] dx *e^(-∫P(x)dx)
=∫(e^2x*e^x)dx*e^(-x)
=((1/3)e^3x+C0)*e^(-x)
=(1/3)e^2x+C0e^(-x)