1/(3x-9)-2/(x^2-9)=1

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


D( x )

x^2-9 = 0

3*x-9 = 0

x^2-9 = 0

x^2-9 = 0

1*x^2 = 9 // : 1

x^2 = 9

x^2 = 9 // ^ 1/2

abs(x) = 3

x = 3 or x = -3

3*x-9 = 0

3*x-9 = 0

3*x-9 = 0 // + 9

3*x = 9 // : 3

x = 9/3

x = 3

x in (-oo:-3) U (-3:3) U (3:+oo)

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

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

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

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

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

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

x^2-3*x^3+9*x^2-6*x+27*x-81+9 = 0

10*x^2-3*x^3+21*x-72 = 0

10*x^2-3*x^3+21*x-72 = 0

10*x^2-3*x^3+21*x-72 = 0

{ 1, -1, 2, -2, 3, -3, 4, -4, 6, -6, 8, -8, 9, -9, 12, -12, 18, -18, 24, -24, 36, -36, 72, -72 }

1

x = 1

10*x^2-3*x^3+21*x-72 = -44

1

-1

x = -1

10*x^2-3*x^3+21*x-72 = -80

-1

2

x = 2

10*x^2-3*x^3+21*x-72 = -14

2

-2

x = -2

10*x^2-3*x^3+21*x-72 = -50

-2

3

x = 3

10*x^2-3*x^3+21*x-72 = 0

3

x-3

x-3*x^2+24

10*x^2-3*x^3+21*x-72

x-3

3*x^3-9*x^2

x^2+21*x-72

3*x-x^2

24*x-72

72-24*x

0

x-3*x^2+24 = 0

DELTA = 1^2-(-3*4*24)

DELTA = 289

DELTA > 0

x = (289^(1/2)-1)/(-3*2) or x = (-289^(1/2)-1)/(-3*2)

x = -8/3 or x = 3

x in { -8/3, 3, 3}

(x+8/3)*(x-3)^2 = 0

((x+8/3)*(x-3)^2)/((3*x-9)*(x^2-9)) = 0

((x+8/3)*(x-3)^2)/((3*x-9)*(x^2-9)) = 0 // * (3*x-9)*(x^2-9)

(x+8/3)*(x-3)^2 = 0

( x+8/3 )

x+8/3 = 0 // - 8/3

x = -8/3

( x-3 )

x-3 = 0 // + 3

x = 3

x in { 3}

x = -8/3

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