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13-04-2020
Mathematics

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what formula should be used when factoring the expressionn x^3+27

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Аноним Аноним

13-04-2020

x³ + 27 which can be written as x³ + 3³

It is in the form of a³ + b³ = ( a + b) ( a² - ab + b²)

so

x³ + 3³

= (x+ 3) (x² - x * 3 + 3²)

= ( x + 3 ) ( x² - 3x + 9)

Hope this helps you.

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