Difference between revisions of "Difference of squares"
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Revision as of 19:33, 10 March 2008
Recognizing a difference of squares is a commonly used factoring technique in algebra. It refers to the identity 
. Note that this identity depends only on the (right and left) distributive property and the commutative property of multiplication and so holds not only for real or complex numbers but also for polynomials, in arithmetic modulo 
for any positive integer , or more generally in any commutative ring.
See Also
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