👉 Unexchangeable in mathematics refers to two different elements or variables that cannot be combined or exchanged. For example, if you have a set of 3 apples and another set of 4 oranges, they are not exchangeable because the order of the fruits matters (since one apple is not the same as another apple). In algebra, these terms can represent mathematical operations like addition and multiplication, but in other contexts, they might refer to different things.