(3x^3-7x^2-9x-2)/(x-(1/5))

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Solution for (3x^3-7x^2-9x-2)/(x-(1/5)) equation:


D( x )

x-(1/5) = 0

x-(1/5) = 0

x-(1/5) = 0

x-1/5 = 0

x-1/5 = 0 // + 1/5

x = 1/5

x in (-oo:1/5) U (1/5:+oo)

(3*x^3-(7*x^2)-(9*x)-2)/(x-(1/5)) = 0

(3*x^3-7*x^2-9*x-2)/(x-1/5) = 0

3*x^3-7*x^2-9*x-2 = 0

3*x^3-7*x^2-9*x-2 = 0

{ 1, -1, 2, -2 }

1

x = 1

3*x^3-7*x^2-9*x-2 = -15

1

-1

x = -1

3*x^3-7*x^2-9*x-2 = -3

-1

2

x = 2

3*x^3-7*x^2-9*x-2 = -24

2

-2

x = -2

3*x^3-7*x^2-9*x-2 = -36

-2

{ 1/3, -1/3, -1/3, 1/3, 2/3, -2/3, -2/3, 2/3 }

1/3

x

1/3

3*x^3-7*x^2-9*x-2 = -5.66666667

1/3

-1/3

x

-1/3

3*x^3-7*x^2-9*x-2 = 0.11111111

-1/3

-1/3

x

-1/3

3*x^3-7*x^2-9*x-2 = 0.11111111

-1/3

1/3

x

1/3

3*x^3-7*x^2-9*x-2 = -5.66666667

1/3

2/3

x

2/3

3*x^3-7*x^2-9*x-2 = -10.22222222

2/3

-2/3

x

-2/3

3*x^3-7*x^2-9*x-2 = 0

-2/3

x+2/3

3*x^2-9*x-3

3*x^3-7*x^2-9*x-2

x+2/3

-3*x^3-2*x^2

-9*x^2-9*x-2

9*x^2+6*x

-3*x-2

3*x+2

0

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

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

DELTA = 117

DELTA > 0

x = (117^(1/2)+9)/(2*3) or x = (9-117^(1/2))/(2*3)

x = (3*13^(1/2)+9)/6 or x = (9-3*13^(1/2))/6

x in { (9-3*13^(1/2))/6, (3*13^(1/2)+9)/6, -2/3}

(x-((9-3*13^(1/2))/6))*(x-((3*13^(1/2)+9)/6))*(x+2/3) = 0

((x-((9-3*13^(1/2))/6))*(x-((3*13^(1/2)+9)/6))*(x+2/3))/(x-1/5) = 0

( x+2/3 )

x+2/3 = 0 // - 2/3

x = -2/3

( x-((3*13^(1/2)+9)/6) )

x-((3*13^(1/2)+9)/6) = 0 // + (3*13^(1/2)+9)/6

x = (3*13^(1/2)+9)/6

( x-((9-3*13^(1/2))/6) )

x-((9-3*13^(1/2))/6) = 0 // + (9-3*13^(1/2))/6

x = (9-3*13^(1/2))/6

x in { -2/3, (3*13^(1/2)+9)/6, (9-3*13^(1/2))/6 }

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