9z/z^2-16

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Solution for 9z/z^2-16 equation: 


D( z )

z^2 = 0

z^2 = 0

z^2 = 0

1*z^2 = 0 // : 1

z^2 = 0

z = 0

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

(9*z)/(z^2)-16 = 0

9*z^-1 = 16 // : 9

z^-1 = 16/9

-1 < 0

1/(z^1) = 16/9 // * z^1

1 = 16/9*z^1 // : 16/9

9/16 = z^1

z = 9/16

z = 9/16

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