simplifying an equation

Discussion in 'Math' started by kokkie_d, Sep 12, 2013.

  1. kokkie_d

    Thread Starter Active Member

    Jan 12, 2009
    72
    0
    Hi,

    suppose I have the following equation:
    \frac{a*b+a*R}{b+R}

    I threw this in maple and on wolfram alpha and Matlab just to see what they do with it to simplify and all came back with: a

    Would someone be able to explain how to go about achieving this?

    thanks in advance
     
  2. kokkie_d

    Thread Starter Active Member

    Jan 12, 2009
    72
    0
    Just saw the solution;

    \frac{a*b+a*R}{b+R} = \frac{a(b+R)}{b+R}=a

    red faced person typing this. lol
     
  3. WBahn

    Moderator

    Mar 31, 2012
    17,715
    4,788
    Don't fret. We all occasionally sit staring at something for a long time only to see (or have pointed out to us) the most simple, obvious solution. It seems like you often spot the solution yourself only after asking someone else -- and I suspect that is not coincidence. The act of explaining the problem to someone else forces you to view the problem somewhat anew.
     
    kokkie_d likes this.
  4. kokkie_d

    Thread Starter Active Member

    Jan 12, 2009
    72
    0
    So true.

    Where is the like button. lol
     
  5. WBahn

    Moderator

    Mar 31, 2012
    17,715
    4,788
    To the far right bottom of the post. ;)
     
    kokkie_d likes this.
  6. MrChips

    Moderator

    Oct 2, 2009
    12,420
    3,355
    There is one condition.

    The result is a if and only if (b + R) ≠ 0.
     
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