Wednesday, May 15, 2013

Factor the sum of two cubes x^3+27


the sum of cubes is: 

a%5E3%2Bb%5E3=%28a%2Bb%29%28a%5E2%2Bab%2Bb%5E2%29 

so... 


x%5E3%2B3%5E3=%28x%2B3%29%28x%5E2%2B3x%2B3%5E2%29 


:)
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