
Algebra PreAlgebra and Basic Algebra Math Forum 
 LinkBack  Thread Tools  Display Modes 
July 21st, 2017, 10:21 AM  #1 
Newbie Joined: Jul 2017 From: Pennsylvania Posts: 1 Thanks: 0  Exponent simplification help needed
Below is a problem I did on khan academy, the first thing I did to simplify the problem was square the top and bottom, but in the solution they waited until the very end to take the square root which changed the answer. Was squaring the top and bottom first not the proper way to do it? I'm confused ughhh.jpg 
July 21st, 2017, 11:26 AM  #2 
Senior Member Joined: May 2016 From: USA Posts: 1,310 Thanks: 550 
You do realize that the jpg is unreadable. What is the problem, and what did YOU do 
July 21st, 2017, 11:58 AM  #3 
Global Moderator Joined: Dec 2006 Posts: 20,389 Thanks: 2015 
$\dfrac{\sqrt{8c^{20}}}{\sqrt{32c^4}} = \dfrac{2\sqrt2c^{10}}{4\sqrt2c^2} = \dfrac{c^8}{2}$ $\dfrac{\sqrt{8c^{20}}}{\sqrt{32c^4}} = \sqrt{\dfrac{8c^{20}}{32c^4}} = \sqrt{\dfrac{c^{16}}{4}} = \dfrac{\sqrt{c^{16}}}{\sqrt4} = \dfrac{c^8}{2}$ 
July 25th, 2017, 05:05 AM  #4 
Math Team Joined: Jan 2015 From: Alabama Posts: 3,264 Thanks: 902 
There is no such thing as "the proper way" to do a math problem!


Tags 
exponent, needed, simplification 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Simplification help  fivestar  Calculus  2  September 25th, 2016 09:50 AM 
Help with simplification  Ku5htr1m  Calculus  19  September 21st, 2016 09:37 AM 
Simplification  Student1  Elementary Math  5  November 22nd, 2014 11:14 AM 
Exponent  bml1105  Algebra  12  July 27th, 2014 11:40 AM 
simplification  arron1990  Calculus  1  December 31st, 1969 04:00 PM 