Solve these quadratic equations, using the complex numbers as the domain
1. x2 + 4 = 0
2. x2 + 9 = 0
3. x2 + 5 = 0
4. x2 + 8 = 0
5. x2 + 2x + 2 = 0
6. x2 + 2x + 5 = 0
7. x2 + 6x + 10 = 0
8. x2 − 6x + 10 = 0
9. x2 + 4x +13 = 0
10. x2 − 8x + 17 = 0