(-z)(-4z/-z-6)-1

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Solution for (-z)(-4z/-z-6)-1 equation: 


D( z )

-z = 0

-z = 0

z = 0

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

-z*((-4*z)/(-z)-6)-1 = 0

-2*(-z)-1 = 0

-2*(-z)-1 = 0

2*z-1 = 0

2*z-1 = 0

2*z-1 = 0 // + 1

2*z = 1 // : 2

z = 1/2

z = 1/2

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