Identify the value of a, b and c and solve for the value of x in each of the following quadratic equations.
1. x2 + 6x + 8 = 0
2. x2 – 4x = 3
3. 4x2 – 5x – 6 = 0
4. 2x2 – x – 1 = 0
5. x2 + 9x + 14 = 0
6. 5x2 = 6 + 13x
7. 3x2 = 2x
8. x2 + 12 = 7x
9. x2 – 8x +12 = 0
10. 4x2 – 12x + 9 = 0
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