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Boolean algebra

  1. Feb 18, 2009 #1
    I was wondering how you can prove using Boolean algebra, x + x'.y = x + y

    I know we must manipulate either side of the equation but I'm just not sure how I can.
    Can anyone offer me some help.
  2. jcsd
  3. Feb 18, 2009 #2
  4. Feb 19, 2009 #3
    You can use the distributive law to expand the expression to this:

    X + X'Y = (X + Y)(X + X')

    Then see that (X + X') = 1 which simplifies to what you have.

    (X + Y)

    Hope that helps.
  5. Jun 23, 2009 #4
    whats boolean algebra? XD
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