My Math Forum Need help with simplifying radicals plezzzz!!!
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 September 15th, 2009, 11:52 AM #1 Newbie   Joined: Sep 2009 Posts: 1 Thanks: 0 Need help with simplifying radicals plezzzz!!! I have these two equations with radicals that need simplifying but i have no idea where to even begin! Please help me i would really appreciate it!!! and (?(x-6)^2) - (?x -6)^2 for the second equation: in the first part the whole thing in parenthesis is in the square root! In the second part only the X is under the square root. Please help I would really appreciate it! Thank you!
 September 15th, 2009, 12:05 PM #2 Newbie   Joined: Sep 2009 Posts: 9 Thanks: 0 Re: Need help with simplifying radicals plezzzz!!! I believe you would rationalize the denominator so put the root 7 +3 and switch the sign then times it by all of them
 September 20th, 2009, 06:51 AM #3 Global Moderator   Joined: Dec 2006 Posts: 20,469 Thanks: 2038 20/(?7 + 3) = 20(3 - ?7)/(3² - 7) = 30 - 10?7 28/?7 = (28?7)/7 = 4?7 Their sum is 30 - 6?7, i.e., 6(5 - ?7). Did you mean ?((x - 6)²) - (?x - 6)² = |x - 6| - (x - 12?x + 36) or did you mean (?(x - 6))² - (?x - 6)² = x - 6 - (x - 12?x + 36)?

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