What are the solutions to the equation x^2+ 2x +2=0?

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online

Could somebody me with this radical simplification?

Ratio of circumference to diameter example plz i need to now what it looks like.