Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
Drexel University or The Math Forum.



Please help me simplify this expression.
Posted:
Jan 22, 2005 10:09 PM


Hello. I have the following expression. I have got it figured out except I am missing a minor detail that is causing me to have 2x+1 instead of 2(x+1) in my final numerator. Please help!
Note that x^1 is (x to the first power) ^(1/2) is to the negative 1/2 power etc...
Problem: [x(x+2)^(1/2) + (x+2)^(1/2) ] / (x+2)^(3/2)
I first separate out the problem and combine the lower exponents to get [x((2/(x+2)) + 1/(x+2)] / (x+2)
Then I distribute the x [2x/(x+2) + 1/(x+2)] / (x+2)
Now combine like terms [(2x+1)/(x+2)] / (x+2)
Now multiply [(2x+1)/(x+2)] * 1/(x+2)
my final result is 2x+1 / (x+2)^2 What step am I missing to get quantity 2(x+1) / (x+2)^2???
Thanks!
 submissions: post to k12.ed.math or email to k12math@k12groups.org private email to the k12.ed.math moderator: kemmoderator@k12groups.org newsgroup website: http://www.thinkspot.net/k12math/ newsgroup charter: http://www.thinkspot.net/k12math/charter.html



