what is the sum of the following

nae

New member
Joined
Jun 18, 2006
Messages
33
Simplify the following:

. . .3 / (wz^2) + 5 / [wz(3 + x)]

The answer I got was 7/wz^2. Did I do this correctly? I added the numerator and got seven, and used the denominator by canceling the 3. If not, then I'm lost.
 

tkhunny

Moderator
Staff member
Joined
Apr 12, 2005
Messages
9,778
Just remember how to add fractions.

\(\displaystyle \L\,\frac{3*(3+x)}{w*z^{2}*(3+x)}+\frac{5*z}{w*z^{2}*(3+x)} = \frac{3*(3+x)+5*z}{w*z^{2}*(3+x)}\)
 

Denis

Senior Member
Joined
Feb 17, 2004
Messages
1,445
nae, remember this:

a/x + b/y = (ay + bx) / xy

now try this: 2/3 + 5/6 = ?
 
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