2-2

If you literally mean the arithmetic 2 − 2, the answer is 0.

If you’re referring to Problem 2-2 from a textbook or assignment, please share the full problem statement (and the course/subject). I can walk you through the solution step by step. If you can’t paste it, tell me the topic (e.g., calculus, linear algebra, statistics) and any given data or formulas, and I’ll guide you accordingly.