SOLUTION: How do I add this problem? b + 2b ____ _________ b-1 b^2-1

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Question 454682: How do I add this problem?
b + 2b
____ _________
b-1 b^2-1
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
How do I add this problem?
b + 2b
____ _________
b-1 b^2-1
-----------
To add or subtract fractions you need to
have a common denominator on the fractions.
------------
least commondenominator is (b-1)(b+1) = b^2-1
------------
Rewrite each fraction with the lcd as its denominator:
[b(b+1)/lcd] + [2b/(lcd]
----
Combine the numerators over the lcd:
---
[b^2+b+2b]/lcd
---
Simplify:
---
= [b^2+3b]/[b^2-1]
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Cheers,
Stan H.