What is the difference between "try" and "try out"?
To try is to make an attempt to do something (or not).
To try out can mean either to attempt to qualify for a team sport
or, when used with an object, to see whether one wants to qualify something for possible use or purchase.
To "try" something also means to sample it. It is also used as an informal way of ordering a particular food item, whether at a dinner or a restaurant.
And, finally, try can be used to mean litigate a case in a court of law
or test the mettle of someone or something.
A little bit more context may be helpful. Off the top of my head, I'd use "try" more in a sense of "have a taste" and "try out" like "test if you like a certain activity". Examples:
For the latter example, "try" will work, too, but for the former, "try out" sounds odd.