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Math Help - Square Root in Denominator

  1. #1
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    Square Root in Denominator

    Why is a radical not allowed in the denominator of a fraction?
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  2. #2
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    It's not not allowed. But it became a standard to rationalize the denominator because back in the day, it was easier to deal with a rational denominator than an irrational one.
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  3. #3
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    ok...

    Quote Originally Posted by Chop Suey View Post
    It's not not allowed. But it became a standard to rationalize the denominator because back in the day, it was easier to deal with a rational denominator than an irrational one.
    Is there a mathematical reason?
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