-x-20/x-1=-9

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Solution for -x-20/x-1=-9 equation: 


D( x )

x = 0

x = 0

x = 0

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

-x-(20/x)-1 = -9 // + 9

9-x-(20/x)-1 = 0

9-x-20*x^-1-1 = 0

8*x^0-1*x^1-20*x^-1 = 0

(8*x^1-1*x^2-20*x^0)/(x^1) = 0 // * x^2

x^1*(8*x^1-1*x^2-20*x^0) = 0

x^1

8*x-x^2-20 = 0

8*x-x^2-20 = 0

DELTA = 8^2-(-20*(-1)*4)

DELTA = -16

DELTA < 0

x in { } 

x belongs to the empty set

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