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Homework Help: How is this simplified?

  1. Mar 22, 2008 #1

    simplifies to a+b

    I didn't think I could simply divide because of the subtraction.
    Is that how this is simplified ?
    If not then please give me a bump in the right direction.
  2. jcsd
  3. Mar 22, 2008 #2
    expand this for me ...


    "Difference of squares ..."
  4. Mar 22, 2008 #3
    Find out what you get by multiplying b-a and b+a.
  5. Mar 22, 2008 #4
    do you know polynomial division? (btw, your result is valid only when a is not equal to b)
  6. Mar 22, 2008 #5
    Argggh!! Thanks everyone!
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