First off, why are you solving an expression?
Second off, what are you doing? What are you trying to do?
English
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I want to know why I kept getting that answer and why I was wrong.
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I'm trying to simplify it as much as possible. The book says that the expression simplifies to x^-1 but I kept getting x^-3.
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Can you wait a few hours? I'm really tired. I think I found your mistake, but I can't explain it yet.
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Alright. Thanks in advance.