1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

This is not a homework question. It is a question that I can't figure out!

  1. Aug 23, 2011 #1
  2. jcsd
  3. Aug 23, 2011 #2
    Remember that

    [tex]x^2=y^2[/tex]

    doesn't mean that x=y. (indeed, we can have x=-y as well).

    Here

    [tex](4-9/2)^2=(5-9/2)^2[/tex]

    doesn't mean that we can leave off the squares.
     
  4. Aug 23, 2011 #3

    mathman

    User Avatar
    Science Advisor

    To simplify (-1/2)2 = (1/2)2
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook




Loading...