(z^3-27)/(z-3)

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Solution for (z^3-27)/(z-3) equation: 


D( z )

z-3 = 0

z-3 = 0

z-3 = 0

z-3 = 0 // + 3

z = 3

z in (-oo:3) U (3:+oo)

(z^3-27)/(z-3) = 0

1*z^3 = 27 // : 1

z^3 = 27

z^3 = 27 // ^ 1/3

z = 3

z in { 3} 

z belongs to the empty set

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