Difference between revisions of "Sum and difference of powers"

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The '''sum and difference of powers''' identities refer to powerful factoring techniques that, respectively, factor a sum of cubes and a difference of certain powers.
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The '''sum and difference of powers''' are powerful factoring techniques that, respectively, factor a sum or a difference of certain powers.
  
 
==Factored Forms of Sums and Differences of Powers==
 
==Factored Forms of Sums and Differences of Powers==

Revision as of 22:05, 10 March 2008

The sum and difference of powers are powerful factoring techniques that, respectively, factor a sum or a difference of certain powers.

Factored Forms of Sums and Differences of Powers

  • $a^n-b^n=(a-b)(a^{n-1}+a^{n-2}b+a^{n-3}b^2+\ldots+ab^{n-2}+b^{n-1}$
  • $a^{2n+1}+b^{2n+1}=(a+b)(a^{2n}-a^{2n-1}b+a^{2n-2}b^2-\ldots-ab^{2n-1}+b^{2n})$

See Also

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