Determine the number and type of complex solutions and possible real solutions for each of the following equations.
1) 2x2 + 5x + 3 = 0
2) 4x3 – 12x + 9 = 0
3) 2x4 + x2 – x + 6 = 0
1) 2x2 + 5x + 3 = 0
2) 4x3 – 12x + 9 = 0
3) 2x4 + x2 – x + 6 = 0