Solve using Variation of Parameters

1.

auxiliary equation

Wronskian = 1

Not sure how to integrate this...

I'd appreciate it if someone could check over what I've done so far and then tell me how to integrate .

2.

auxiliary equation

Wronskian = 8

so

Not sure if I did something wrong because when I used undetermined coefficients to solve the problem, I only got ...?

Thanks in advance.