x^2-3x-54/x-9

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Solution for x^2-3x-54/x-9 equation:


D( x )

x = 0

x = 0

x = 0

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

x^2-(3*x)-(54/x)-9 = 0

x^2-3*x-54*x^-1-9 = 0

1*x^2-3*x^1-54*x^-1-9*x^0 = 0

(1*x^3-3*x^2-9*x^1-54*x^0)/(x^1) = 0 // * x^2

x^1*(1*x^3-3*x^2-9*x^1-54*x^0) = 0

x^1

x^3-3*x^2-9*x-54 = 0

{ 1, -1, 2, -2, 3, -3, 6, -6, 9, -9, 18, -18, 27, -27, 54, -54 }

1

x = 1

x^3-3*x^2-9*x-54 = -65

1

-1

x = -1

x^3-3*x^2-9*x-54 = -49

-1

2

x = 2

x^3-3*x^2-9*x-54 = -76

2

-2

x = -2

x^3-3*x^2-9*x-54 = -56

-2

3

x = 3

x^3-3*x^2-9*x-54 = -81

3

-3

x = -3

x^3-3*x^2-9*x-54 = -81

-3

6

x = 6

x^3-3*x^2-9*x-54 = 0

6

x-6

x^2+3*x+9

x^3-3*x^2-9*x-54

x-6

6*x^2-x^3

3*x^2-9*x-54

18*x-3*x^2

9*x-54

54-9*x

0

x^2+3*x+9 = 0

DELTA = 3^2-(1*4*9)

DELTA = -27

DELTA < 0

x in { 6}

x = 6

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