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!

Root thing

  1. Jul 5, 2007 #1
    quick question:

    how does this work- (root)72 = 6(root)2

    and what is this technique called?
  2. jcsd
  3. Jul 5, 2007 #2


    User Avatar
    Staff Emeritus
    Science Advisor

    To simplify squareroots one writes the argument as a product, one of which is a square number. So, [itex]\sqrt{72}=\sqrt{36\times 2}=\sqrt{36}\sqrt{2}=6\sqrt{2}[/itex]

    The technique I guess would be called simplifying a square root.
  4. Jul 5, 2007 #3


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Square roots of integers are often labelled 'surds' in textbooks.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook