x+4/x-1*x^2+x/x-1

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Solution for x+4/x-1*x^2+x/x-1 equation: 


D( x )

x = 0

x = 0

x = 0

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

x-(1*x^2)+4/x+x/x-1 = 0

x-x^2+4/x+x/x-1 = 0

1*x^1-1*x^2+4*x^-1 = 0

(1*x^2-1*x^3+4*x^0)/(x^1) = 0 // * x^2

x^1*(1*x^2-1*x^3+4*x^0) = 0

x^1

x^2-x^3+4 = 0

{ 1, -1, 2, -2, 4, -4 }

1

x = 1

x^2-x^3+4 = 4

1

-1

x = -1

x^2-x^3+4 = 6

-1

2

x = 2

x^2-x^3+4 = 0

2

x-2

-x^2-x-2

x^2-x^3+4

x-2

x^3-2*x^2

4-x^2

x^2-2*x

4-2*x

2*x-4

0

-x^2-x-2 = 0

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

DELTA = -7

DELTA < 0

x in { 2} 

x = 2

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