Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Easy problem!

  1. Dec 7, 2004 #1
    can someone / anyone tell me the trick to solve

    501^2 - 400^2

    Beginning to feel a little stupid now :blushing:
  2. jcsd
  3. Dec 7, 2004 #2


    User Avatar
    Science Advisor
    Homework Helper

    It's a difference of two squares, a^2-b^2=(a+b)(a-b).
  4. Dec 7, 2004 #3


    User Avatar
    Science Advisor
    Homework Helper

    Incidentally, you are not solving anything. You are simplifying a numerical expression. "Solve" generally means you are obtaining the value of one or more unknown quantities.
  5. Dec 7, 2004 #4
    Thank you both
    (seems so obvious now you've helped me simplify it!)
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Easy problem!
  1. Easy Question (Replies: 11)

  2. Easy Sequence (Replies: 2)

  3. Easy integral (Replies: 2)