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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
6*x-x-((7/2)*x)+5/x-10-5 = 0
6*x-x+(-7/2)*x+5/x-10-5 = 0
3/2*x^1+5*x^-1-15*x^0 = 0
(3/2*x^2-15*x^1+5*x^0)/(x^1) = 0 // * x^2
x^1*(3/2*x^2-15*x^1+5*x^0) = 0
x^1
(3/2)*x^2-15*x+5 = 0
(3/2)*x^2-15*x+5 = 0
DELTA = (-15)^2-(4*5*(3/2))
DELTA = 195
DELTA > 0
x = (195^(1/2)+15)/(2*(3/2)) or x = (15-195^(1/2))/(2*(3/2))
x = (195^(1/2)+15)/3 or x = (15-195^(1/2))/3
x in { (15-195^(1/2))/3, (195^(1/2)+15)/3}
x in { (15-195^(1/2))/3, (195^(1/2)+15)/3 }
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