Hi I agree with stat B
Stat1. Both x=2 and x=4 give a YES for the question but 5 gives a NO.So insifficient
Stat2. For all values of x<0 ; sqrt[(x-3)^2] is not equal to (3-x)^2 . So sufficient.
I think the trick is to plug in numbers
My question is why the solving for x will not work?
You need to be careful with solving for variables.
If you solve for sqrt[(x-3)^2]=(3-x)^2
your calculations assume that (x-3) is positive, it could be that x-3 is negative in which case your equation would look like this:
This would solve for x=2 and x=3
So you still have 2 options, x=2 and x=4 which is insufficient.
If you tried plugging in numbers you would just save time.
Hope this helps!