misstiger2058 misstiger2058

03-01-2018
Mathematics

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how would the expression x^3+8 be written using the sum of cubes

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Willchemistry Willchemistry

03-01-2018

Hey there!:

x³ + 8 :

Apply sum of cubes rule :

x³ + y³ = ( x + y )( x² - 2x + 4 ) =

x³ + 8 = ( x + 2 )( x² - 2x + 2² ) =

refine :

x³ + 8 = ( x + 2 )( x² - 2x + 4 )

hope this helps!

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