x^3/x^2-81 - solution

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Solution for x^3/x^2-81 equation:

D( x )

x^2 = 0

x^2 = 0

x^2 = 0

1*x^2 = 0 // : 1

x^2 = 0

x = 0

x in (-oo:0) U (0:+oo)

(x^3)/(x^2)-81 = 0

x-81 = 0 // + 81

x = 81

x = 81

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