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Math Help - PLZ somone help with the method to simplify expressions

  1. #1
    Junior Member
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    Oct 2007
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    PLZ somone help with the method to simplify expressions

    I'm finding it very difficult to simplify expressions:
    Can anyone tell me the method:
    For example:
    3cd2 The 2 is supposed to be a 'squared sign'
    5cd
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  2. #2
    Member
    Joined
    Aug 2007
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    Well if you have a fraction like that you see whats on the top and whats on the bottom and then you look to see what you can simplify (get rid of) e.g.

    Simplify: \frac {7A4B10C2D^2}{4A2B10CD^2}

    First imagine the fraction in similar segmented fractions (if that is even grammatically correct)

     <br />
\implies \frac {7A}{4A} \cdot \frac {4B}{2B} \cdot \frac {10C}{10C} \cdot \frac {2D^2}{D^2}<br />

    Now work them out individually:

    \frac {7A}{4A} cannot be simplified so it remains the same.

    \frac {4B}{2B} \implies 2B

    \frac {10C}{10C} \implies 1

    \frac {2D^2}{D^2} \implies 2

    Now combine them (put them back)

     \frac {7A}{4A} \cdot 2B \cdot 1 \cdot 2
     \implies \frac {14A4B}{4A}

    However even this can be simplified;

    \frac {2(7A2B)}{2(2A)}\implies \frac {7A2B}{2A}<br />

    This seems a bit long-winded but once you get the hang of it, it becomes much quicker and easier. Now try yours.
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  3. #3
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    Santiago
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    Quote Originally Posted by dravid2 View Post
    I'm finding it very difficult to simplify expressions:
    Can anyone tell me the method:
    For example:
    3cd2 The 2 is supposed to be a 'squared sign'
    5cd
    3d/5 ???

    the d2 and d cancel 1 to leave a d at the top
    the c's cancel and so your left with 3d/5 because 3 and 5 cant cancel eachother.. im new to this aswell so if im wrong, please correct me.
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