z+1/z=9/8

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Solution for z+1/z=9/8 equation: 


D( z )

z = 0

z = 0

z = 0

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

z+1/z = 9/8 // - 9/8

z+1/z-(9/8) = 0

z+1/z-9/8 = 0

1*z^1+1*z^-1-9/8*z^0 = 0

(1*z^2-9/8*z^1+1*z^0)/(z^1) = 0 // * z^2

z^1*(1*z^2-9/8*z^1+1*z^0) = 0

z^1

z^2+(-9/8)*z+1 = 0

z^2+(-9/8)*z+1 = 0

DELTA = (-9/8)^2-(1*1*4)

DELTA = -175/64

DELTA < 0

z in { } 

z belongs to the empty set

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