3z-2/z-7

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Solution for 3z-2/z-7 equation: 


D( z )

z = 0

z = 0

z = 0

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

3*z-(2/z)-7 = 0

3*z-2*z^-1-7 = 0

3*z^1-2*z^-1-7*z^0 = 0

(3*z^2-7*z^1-2*z^0)/(z^1) = 0 // * z^2

z^1*(3*z^2-7*z^1-2*z^0) = 0

z^1

3*z^2-7*z-2 = 0

3*z^2-7*z-2 = 0

DELTA = (-7)^2-(-2*3*4)

DELTA = 73

DELTA > 0

z = (73^(1/2)+7)/(2*3) or z = (7-73^(1/2))/(2*3)

z = (73^(1/2)+7)/6 or z = (7-73^(1/2))/6

z in { (7-73^(1/2))/6, (73^(1/2)+7)/6} 

z in { (7-73^(1/2))/6, (73^(1/2)+7)/6 }

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