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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)
x/x-(4/x)-3+3 = 18/(x^2)-9 // - 18/(x^2)-9
x/x-(4/x)-(18/(x^2))-3+3+9 = 0
x/x-4*x^-1-18*x^-2-3+3+9 = 0
10-4*x^-1-18*x^-2 = 0
t_1 = x^-1
10-18*t_1^2-4*t_1^1 = 0
10-18*t_1^2-4*t_1 = 0
DELTA = (-4)^2-(-18*4*10)
DELTA = 736
DELTA > 0
t_1 = (736^(1/2)+4)/(-18*2) or t_1 = (4-736^(1/2))/(-18*2)
t_1 = (4*46^(1/2)+4)/(-36) or t_1 = (4-4*46^(1/2))/(-36)
t_1 = (4*46^(1/2)+4)/(-36)
x^-1-((4*46^(1/2)+4)/(-36)) = 0
1*x^-1 = (4*46^(1/2)+4)/(-36) // : 1
x^-1 = (4*46^(1/2)+4)/(-36)
-1 < 0
1/(x^1) = (4*46^(1/2)+4)/(-36) // * x^1
1 = ((4*46^(1/2)+4)/(-36))*x^1 // : (4*46^(1/2)+4)/(-36)
-36*(4*46^(1/2)+4)^-1 = x^1
x = -36*(4*46^(1/2)+4)^-1
t_1 = (4-4*46^(1/2))/(-36)
x^-1-((4-4*46^(1/2))/(-36)) = 0
1*x^-1 = (4-4*46^(1/2))/(-36) // : 1
x^-1 = (4-4*46^(1/2))/(-36)
-1 < 0
1/(x^1) = (4-4*46^(1/2))/(-36) // * x^1
1 = ((4-4*46^(1/2))/(-36))*x^1 // : (4-4*46^(1/2))/(-36)
-36*(4-4*46^(1/2))^-1 = x^1
x = -36*(4-4*46^(1/2))^-1
x in { -36*(4*46^(1/2)+4)^-1, -36*(4-4*46^(1/2))^-1 }
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