help please, i don’t understand and i need to show work.

Answer:
Step-by-step explanation:
a = 1 ; b= -6
Plug in the value of a and b in the equation
[tex]x = \frac{-b}{2a}\\\\= \frac{-(-6)}{2*1}\\\\= \frac{6}{2}\\\\= 3[/tex]