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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
2/x-((12/8)*x)-5 = 0
(-3/2)*x+2/x-5 = 0
2*x^-1-3/2*x^1-5*x^0 = 0
(2*x^0-3/2*x^2-5*x^1)/(x^1) = 0 // * x^2
x^1*(2*x^0-3/2*x^2-5*x^1) = 0
x^1
(-3/2)*x^2-5*x+2 = 0
(-3/2)*x^2-5*x+2 = 0
DELTA = (-5)^2-(2*4*(-3/2))
DELTA = 37
DELTA > 0
x = (37^(1/2)+5)/(2*(-3/2)) or x = (5-37^(1/2))/(2*(-3/2))
x = (37^(1/2)+5)/(-3) or x = (5-37^(1/2))/(-3)
x in { (37^(1/2)+5)/(-3), (5-37^(1/2))/(-3)}
x in { (37^(1/2)+5)/(-3), (5-37^(1/2))/(-3) }
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