<PRE><B>Question 977512</B>
 Does the denominator have to be even out so adding and subtracting for the numerator will be easier?
2x+5/x+1  + x+7/x+5  - 5x+17/x^2+6x+5

2x+5/x+1  
Add x+7/x+5 
Subtract  5x+17/x^2+6x+5
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The DENs have to be the same to add or subtract.
x^2+6x+5 is the product of the other 2 DENs.
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