That is negative since the elevator is decreasing. If the elevator was going up, it would be positive.
Adding a value to the X value shifts the graph that many units to the left.
X+2 adds 2 to x, so the graph would shift 2 unites to the left.
The answer is:
The graph of g(x) is the graph of f(x) translated 2 units left.
Lets first take out the GCF of the numbers, we get
3 ( 4a^2 - 12ab + 9b^2)
= 3 ( 2a - 3b)(2a - 3b)
That's it