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How is this simplified?

360
21
b^2-a^2
-----------
b-a


simplifies to a+b



I didn't think I could simply divide because of the subtraction.
Is that how this is simplified ?
If not then please give me a bump in the right direction.
 

Answers and Replies

1,750
1
expand this for me ...

[tex](a^2-b^2)=???[/tex]

"Difference of squares ..."
 
2,035
2
Find out what you get by multiplying b-a and b+a.
 
631
0
do you know polynomial division? (btw, your result is valid only when a is not equal to b)
 
360
21
Argggh!! Thanks everyone!
 

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