5/z*z-7/z*z*z

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Solution for 5/z*z-7/z*z*z equation: 


D( z )

z = 0

z = 0

z = 0

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

(5/z)*z-((7/z)*z*z) = 0

(5/z)*z-7*z = 0

5-7*z = 0 // - 5

-7*z = -5 // : -7

z = -5/(-7)

z = 5/7

z = 5/7

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