(x-1)/3+(19-x^2)/3x=6

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Solution for (x-1)/3+(19-x^2)/3x=6 equation:


x in (-oo:+oo)

(x-1)/3+x*((19-x^2)/3) = 6 // - 6

(x-1)/3+x*((19-x^2)/3)-6 = 0

(x-1)/3+(x*(19-x^2))/3-6 = 0

(x-1)/3+(x*(19-x^2))/3+(-6*3)/3 = 0

x*(19-x^2)+x-6*3-1 = 0

20*x-x^3-18-1 = 0

20*x-x^3-19 = 0

20*x-x^3-19 = 0

20*x-x^3-19 = 0

{ 1, -1, 19, -19 }

1

x = 1

20*x-x^3-19 = 0

1

x-1

19-x^2-x

20*x-x^3-19

x-1

x^3-x^2

20*x-x^2-19

x^2-x

19*x-19

19-19*x

0

19-x^2-x = 0

DELTA = (-1)^2-(-1*4*19)

DELTA = 77

DELTA > 0

x = (77^(1/2)+1)/(-1*2) or x = (1-77^(1/2))/(-1*2)

x = (77^(1/2)+1)/(-2) or x = (1-77^(1/2))/(-2)

x in { (77^(1/2)+1)/(-2), (1-77^(1/2))/(-2), 1}

(x-((77^(1/2)+1)/(-2)))*(x-((1-77^(1/2))/(-2)))*(x-1) = 0

((x-((77^(1/2)+1)/(-2)))*(x-((1-77^(1/2))/(-2)))*(x-1))/3 = 0

((x-((77^(1/2)+1)/(-2)))*(x-((1-77^(1/2))/(-2)))*(x-1))/3 = 0 // * 3

(x-((77^(1/2)+1)/(-2)))*(x-((1-77^(1/2))/(-2)))*(x-1) = 0

( x-((1-77^(1/2))/(-2)) )

x-((1-77^(1/2))/(-2)) = 0 // + (1-77^(1/2))/(-2)

x = (1-77^(1/2))/(-2)

( x-((77^(1/2)+1)/(-2)) )

x-((77^(1/2)+1)/(-2)) = 0 // + (77^(1/2)+1)/(-2)

x = (77^(1/2)+1)/(-2)

( x-1 )

x-1 = 0 // + 1

x = 1

x in { (1-77^(1/2))/(-2), (77^(1/2)+1)/(-2), 1 }

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