
Algebra PreAlgebra and Basic Algebra Math Forum 
 LinkBack  Thread Tools  Display Modes 
October 20th, 2008, 07:28 PM  #1 
Newbie Joined: Jun 2008 Posts: 20 Thanks: 0  Simplification help
Could anybody please explain how [attachment=1:2qzns35k]1.gif[/attachment:2qzns35k] simplifies to [attachment=0:2qzns35k]2.GIF[/attachment:2qzns35k]? I'm not much good with throwing rational exponents around Thanks! 
October 20th, 2008, 07:36 PM  #2 
Senior Member Joined: Jul 2008 Posts: 895 Thanks: 0  Re: Simplification help
Your problem might not be so much exponents as fractions? Multiply AND divide 3x^(7/3) by 3x^(2/3) to have a common denominator for dividing [[color=#FF0000]Did I say, "dividing"? I mean adding[/color]] fractions. You should know how to multiply the two, or you had better go back over the fundamental rules for multiplying exponents (a^b)(a^c) = a^(b+c). You should know how to express the top part as a sum over a common denominator, that is as a single fraction. You now have one fraction divided by something. Apply this rule: (a/b)/c = (a/b)/(c/1) = (a/b)(1/c) = a/(bc) The end result might be factored, but to no further advantage here. 
October 20th, 2008, 07:45 PM  #3 
Newbie Joined: Jun 2008 Posts: 20 Thanks: 0  Re: Simplification help
Ah! It makes sense now, thanks. Our Calc teacher doesn't make us simplify anything once the Calculus is done, but I've been doing all the problems anyway just to give myself the practice since I've been away from school (and math) for such a long time. Thanks for the help!

October 21st, 2008, 01:17 PM  #4  
Senior Member Joined: Jul 2008 Posts: 895 Thanks: 0  Re: Simplification help Quote:
 

Tags 
simplification 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Simplification  Chikis  Elementary Math  2  September 11th, 2013 10:11 AM 
simplification  arron1990  Algebra  3  August 14th, 2012 04:50 AM 
Need some help with simplification  p3aul  Algebra  5  January 23rd, 2011 09:11 PM 
Simplification  wulfgarpro  Algebra  7  April 18th, 2010 03:16 AM 
Simplification  wulfgarpro  Algebra  5  April 14th, 2010 01:13 AM 