In the equation x/6 = 9 what operation do you need to use to get the
variable x by itself?

Multiplication

Step-by-step explanation:

You can see there is a division with the 6, and to get rid of 6, you need to multiply it :)

  a = -4,  b = 8,  c = 3

This is because the general template is ax^2+bx+c

Matching up the terms gets us what is shown in bold. The x's are not involved as part of a,b,c. We just focus on the numbers in front.

The graph is shown below. I used GeoGebra to make the graph.