2-2

Do you mean the arithmetic 2 − 2, which equals 0? Or are you referring to Exercise 2.2 from your textbook/notes? If it’s the latter, please share the problem statement or the topic of 2.2, and I’ll walk you through it step by step. If you want practice, tell me the subject (e.g., algebra, calculus, statistics) and I can generate a few 2.2-style problems.