2-2

Do you mean the arithmetic 2 − 2, which equals 0? If not, please share the exact problem statement for “2-2” (e.g., Exercise 2.2 from your textbook or notes). Paste the full text or a photo, and I’ll walk you through the solution and the key concepts. If you can specify the course (e.g., Algebra, Calculus II, Linear Algebra) and maybe the textbook edition, I can tailor the guidance.