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May 6th, 2014, 08:05 PM  #1 
Senior Member Joined: Jan 2012 Posts: 745 Thanks: 7  Simplify [latex]m+n/2  mn/3 + 3(m1)[/latex]
Simplify /frac{m+n}{2}frac{mn}{3} + 3(m1) = = = When I checked my text book after working the final answer was given as . What is wrong? I believe that my own answer is very right. How do I check to see that an algebraic expression is right after simplifying it. I want to know if there is special way to check the accurateness of an expression after simplifying. Last edited by Chikis; May 6th, 2014 at 08:44 PM. 
May 6th, 2014, 08:48 PM  #2 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,597 Thanks: 1039 
Can't tell how you arrived at your answer...but it is VERY wrong. To check an answer, simply substitute a value for each variable, then compare original to final... 
May 7th, 2014, 01:13 PM  #3 
Global Moderator Joined: May 2007 Posts: 6,854 Thanks: 744 
/frac{m+n}{2}frac{mn}{3} + 3(m1) should be $\displaystyle \frac{m+n}{2}\frac{mn}{3} + 3(m1)$ 
June 11th, 2014, 02:33 AM  #4 
Senior Member Joined: Jan 2012 Posts: 745 Thanks: 7 
Hello! How do I write 6(17/16)exponent 1/2 * 2exponent 1. All the expressions inside the bracket is raised to negative exponent of 1/2 times 2 raised to negative exponent of 1. 
June 11th, 2014, 03:47 AM  #5  
Math Team Joined: Apr 2010 Posts: 2,780 Thanks: 361  Quote:
In this case, as there are two variables, it suffices to check two such pairs. Last edited by Hoempa; June 11th, 2014 at 03:50 AM.  

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