Question

Questions are attatched below, Thanks! 

Even if you're able to just solve 2 or 3 of them any help is appreciated.

Answer 1

5. There are 3 roots

x = 0 and x = -4 (multiplicity 2) Degree 3.

6. x = -3, -5 and x = 5 (multiplicity 2) Degree 4.