I'd use synthetic div. here, with 2 as my divisor:
________________
2 / 1 -11 18
2 -18
----------------------------
1 -9 0
Note that the coefficients of the missing factor are given here and are 1 and -9. Thus, (x-9) is the missing factor.
What do you need help on? All I see is a y axis and x axis grid.
Answer:
1
Step-by-step explanation:
Given :
divided by 
Now, it can be solving as:

Simplest form of given equation is 1