1. Solve x2 + 6x + 8 = 0
2. Find the values of x where x2 + 9x + 18 = 0
3. Solve x2 + x − 56 = 0
4. Find the values of x where x2 + 10x − 24 = 0
5. Solve x2 − 16x + 60 = 0
6. Find the values of x where x2 − 15x + 36 = 0
7. Solve x2 − 8x − 48 = 0