Final answer:
When solving problems involving operations on rational algebraic expressions, it is important to simplify the expressions and check the final answer for reasonableness.
Step-by-step explanation:
When solving problems involving operations on rational algebraic expressions, there are several important concepts and principles to keep in mind. First, it's important to simplify the expressions by eliminating terms wherever possible. This helps make the problem more manageable and easier to solve. Additionally, it's crucial to check the final answer to see if it is reasonable and makes sense in the context of the problem.