Answer:

Step-by-step explanation:
1. 
The characteristic equation for the given differential equation is:



Since the roots are complex
Now, the general solution is:

2. 

Divide both sides by 
Let, 


Here, 
I.F. 
Now, the general solution is:



3. 
The characteristic equation is:





Since the roots are real and repeated.
Now, the general solution is:

4. 

Integrating both sides


5. 
Here, 
I.F.
Now, the general solution is:

Let, 


