Math help

[Guest]

Can anyone help me with at least 2 exercises from the photo?

[HallsofIvy]

What do you mean by "help"? If you would show what you can do and what you do understand here, I am sure people would help you resolve misunderstandings or fix mistakes.

Second question: where did you get these problems? Are you taking a course in differential equations? If so you should know how to at least start on them. Several of these problems are, or can be resolved to, "linear equations with constant coefficients". Those are typically solved by first solving the corresponding "characteristic equation". Do you know how to find that?