8/7z+5/z=1

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Solution for 8/7z+5/z=1 equation: 


D( z )

z = 0

z = 0

z = 0

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

(8/7)*z+5/z = 1 // - 1

(8/7)*z+5/z-1 = 0

8/7*z^1+5*z^-1-1*z^0 = 0

(8/7*z^2-1*z^1+5*z^0)/(z^1) = 0 // * z^2

z^1*(8/7*z^2-1*z^1+5*z^0) = 0

z^1

(8/7)*z^2-z+5 = 0

(8/7)*z^2-z+5 = 0

DELTA = (-1)^2-(4*5*(8/7))

DELTA = -153/7

DELTA < 0

z in { } 

z belongs to the empty set

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