Answer:
B. 3
Step-by-step explanation:
The given equation is
[tex] - {x}^{2} + 6x - 9 = 0[/tex]
The solution to the above equation is where the graph touches the x-axis.
The x-intercept of the graph is (3,0)
Hence the solution to the given equation is x=3.
The graph is shown in the attachment