Answer:mean
Step-by-step explanation: I am also not sure because I been looking for the anwser to this but I think it’s mean
+ √6 = √9
The first step is to get
by itself. We can do this by subtracting
from each side, and simplifying 
= 3 - 
Now we square both sides
5x = (3 -
)²
Using the formula (a - b)² = a² -2ab + b², (3 -
)² = 15 - 6
5x = 15 - 6
x = 
3/5 is 60% 3/15 is 20% divide 60% by 20% and you have a 3 hope this helps