Question

1. x² + 4x + 3 = 0

2. 6x² + 12x - 18 = 0
3. x² + 4x - 21 = 0
4. 2x² + 3x - 2 = 0
5. 3x² - 10x - 8 = 0

Answer 1

1. x = -1 or x = -3

2. x = 1 or x = -3

3. x = 3 or x = -7

4. x = 1/2 or x = -2

5. x = -2/3 or x = 4

Explanation:

I'm guessing these are what you needed, you didn't specify.