B. Find the solutions of the following quadratic equation using the quadratic formula. Show your solution.
1. x2 + 10x = -9
2. x2 - 4x + 12 = 0
3. 2x2 + 7x + 9 = 0
4. 3x2 - 4x = 0
5. 3x2 + 4x = -3
6. x2 + 7x = 4
7. x2 + 5x = 9
8. x2 + 3x - 4 = 0
9. 2x2 + 5x = -6
10. x2 + 9x = 6
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