I have a couple problems I dont understand any help is appreciated..

1.) x^4 - 3x^2 - 4 > 0 solve algebraically.

2.) degree 4: zeros: 3+2i; 4, mulpilicity 2

3.) degree 4: zeros: 3, multiplicity 2; -i

I dont understand 2 and 3 at all, if anyone has any outside sources or good definitions for the problems it would be nice

thanks