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D( x )
x = 0
x^2 = 0
x = 0
x = 0
x^2 = 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in (-oo:0) U (0:+oo)
6/x-(2/x)+3+3 = 5/(x^2)-9 // - 5/(x^2)-9
6/x-(2/x)-(5/(x^2))+3+3+9 = 0
6/x-2*x^-1-5*x^-2+3+3+9 = 0
4*x^-1-5*x^-2+15 = 0
t_1 = x^-1
4*t_1^1-5*t_1^2+15 = 0
4*t_1-5*t_1^2+15 = 0
DELTA = 4^2-(-5*4*15)
DELTA = 316
DELTA > 0
t_1 = (316^(1/2)-4)/(-5*2) or t_1 = (-316^(1/2)-4)/(-5*2)
t_1 = (2*79^(1/2)-4)/(-10) or t_1 = (-2*79^(1/2)-4)/(-10)
t_1 = (2*79^(1/2)-4)/(-10)
x^-1-((2*79^(1/2)-4)/(-10)) = 0
1*x^-1 = (2*79^(1/2)-4)/(-10) // : 1
x^-1 = (2*79^(1/2)-4)/(-10)
-1 < 0
1/(x^1) = (2*79^(1/2)-4)/(-10) // * x^1
1 = ((2*79^(1/2)-4)/(-10))*x^1 // : (2*79^(1/2)-4)/(-10)
-10*(2*79^(1/2)-4)^-1 = x^1
x = -10*(2*79^(1/2)-4)^-1
t_1 = (-2*79^(1/2)-4)/(-10)
x^-1-((-2*79^(1/2)-4)/(-10)) = 0
1*x^-1 = (-2*79^(1/2)-4)/(-10) // : 1
x^-1 = (-2*79^(1/2)-4)/(-10)
-1 < 0
1/(x^1) = (-2*79^(1/2)-4)/(-10) // * x^1
1 = ((-2*79^(1/2)-4)/(-10))*x^1 // : (-2*79^(1/2)-4)/(-10)
-10*(-2*79^(1/2)-4)^-1 = x^1
x = -10*(-2*79^(1/2)-4)^-1
x in { -10*(2*79^(1/2)-4)^-1, -10*(-2*79^(1/2)-4)^-1 }
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