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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)
(2*x)/x-(6/x)-3 = 18/(x^2)-3 // - 18/(x^2)-3
(2*x)/x-(6/x)-(18/(x^2))-3+3 = 0
(2*x)/x-6*x^-1-18*x^-2-3+3 = 0
2-6*x^-1-18*x^-2 = 0
t_1 = x^-1
2-18*t_1^2-6*t_1^1 = 0
2-18*t_1^2-6*t_1 = 0
DELTA = (-6)^2-(-18*2*4)
DELTA = 180
DELTA > 0
t_1 = (180^(1/2)+6)/(-18*2) or t_1 = (6-180^(1/2))/(-18*2)
t_1 = (6*5^(1/2)+6)/(-36) or t_1 = (6-6*5^(1/2))/(-36)
t_1 = (6*5^(1/2)+6)/(-36)
x^-1-((6*5^(1/2)+6)/(-36)) = 0
1*x^-1 = (6*5^(1/2)+6)/(-36) // : 1
x^-1 = (6*5^(1/2)+6)/(-36)
-1 < 0
1/(x^1) = (6*5^(1/2)+6)/(-36) // * x^1
1 = ((6*5^(1/2)+6)/(-36))*x^1 // : (6*5^(1/2)+6)/(-36)
-36*(6*5^(1/2)+6)^-1 = x^1
x = -36*(6*5^(1/2)+6)^-1
t_1 = (6-6*5^(1/2))/(-36)
x^-1-((6-6*5^(1/2))/(-36)) = 0
1*x^-1 = (6-6*5^(1/2))/(-36) // : 1
x^-1 = (6-6*5^(1/2))/(-36)
-1 < 0
1/(x^1) = (6-6*5^(1/2))/(-36) // * x^1
1 = ((6-6*5^(1/2))/(-36))*x^1 // : (6-6*5^(1/2))/(-36)
-36*(6-6*5^(1/2))^-1 = x^1
x = -36*(6-6*5^(1/2))^-1
x in { -36*(6*5^(1/2)+6)^-1, -36*(6-6*5^(1/2))^-1 }
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