Quadratic equations of one variable

x2 + x - 2 = 0
Solution(s): #of solutions:

x2 - 9 = 0
Solution(s): #of solutions:

x2 + 6x = 0
Solution(s): #of solutions:

x2 - 6x = 0
Solution(s): #of solutions:

x2 + 6x + 9 = 0
Solution(s): #of solutions:

x2 + 6x - 9 = 0
Solution(s): #of solutions:

x2 - 6x - 9 = 0
Solution(s): #of solutions:

x2 - 6x + 9 = 0
Solution(s): #of solutions:

x2 + x - 1 = 0
Solution(s): #of solutions:

x2 + x + 1 = 0
Solution(s): #of solutions: