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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)
-(9/X)-(6/(X^2)) = -4/3 // + -4/3
-(9/X)-(6/(X^2))-(-4/3) = 0
4/3-9*X^-1-6*X^-2 = 0
t_1 = X^-1
4/3-6*t_1^2-9*t_1^1 = 0
4/3-6*t_1^2-9*t_1 = 0
DELTA = (-9)^2-(-6*4/3*4)
DELTA = 113
DELTA > 0
t_1 = (113^(1/2)+9)/(-6*2) or t_1 = (9-113^(1/2))/(-6*2)
t_1 = (113^(1/2)+9)/(-12) or t_1 = (9-113^(1/2))/(-12)
t_1 = (113^(1/2)+9)/(-12)
X^-1-((113^(1/2)+9)/(-12)) = 0
1*X^-1 = (113^(1/2)+9)/(-12) // : 1
X^-1 = (113^(1/2)+9)/(-12)
-1 < 0
1/(X^1) = (113^(1/2)+9)/(-12) // * X^1
1 = ((113^(1/2)+9)/(-12))*X^1 // : (113^(1/2)+9)/(-12)
-12*(113^(1/2)+9)^-1 = X^1
X = -12*(113^(1/2)+9)^-1
t_1 = (9-113^(1/2))/(-12)
X^-1-((9-113^(1/2))/(-12)) = 0
1*X^-1 = (9-113^(1/2))/(-12) // : 1
X^-1 = (9-113^(1/2))/(-12)
-1 < 0
1/(X^1) = (9-113^(1/2))/(-12) // * X^1
1 = ((9-113^(1/2))/(-12))*X^1 // : (9-113^(1/2))/(-12)
-12*(9-113^(1/2))^-1 = X^1
X = -12*(9-113^(1/2))^-1
X in { -12*(113^(1/2)+9)^-1, -12*(9-113^(1/2))^-1 }
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