Answer:
x1 = 0
x2 = 3
Explanation:

If that's the right equation we can now just simplify it a bit.

Cause now it becomes obvious that we can break out x and make it into a parenthesis:

And now there's two possibilities for what x could be. Either, x is 0:

Or, the parenthesis is 0, which means that x is 3 (because 3-3=0) :

So x has two answers:
x1 = 0
x2 = 3
At least I hope this was what you were looking for