SOLUTION: When solving a rational equation, why is it necessary to perform a check?

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Question 126096: When solving a rational equation, why is it necessary to perform a check?
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
YOU SHOULD ALWAYS, IF TIME ALLOWS, TO CHECK YOU ANSWER FOR 2 REASONS:
1) SO YOU KNOW YOU HAVEN'T WASTED YOUR TIME.
2) SO YOU KNOW YOU HAVE THE CORRECT ANSWER .