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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
3/x = (11/5)*x+4 // - (11/5)*x+4
3/x-((11/5)*x)-4 = 0
(-11/5)*x+3/x-4 = 0
3*x^-1-11/5*x^1-4*x^0 = 0
(3*x^0-11/5*x^2-4*x^1)/(x^1) = 0 // * x^2
x^1*(3*x^0-11/5*x^2-4*x^1) = 0
x^1
(-11/5)*x^2-4*x+3 = 0
(-11/5)*x^2-4*x+3 = 0
DELTA = (-4)^2-(3*4*(-11/5))
DELTA = 212/5
DELTA > 0
x = ((212/5)^(1/2)+4)/(2*(-11/5)) or x = (4-(212/5)^(1/2))/(2*(-11/5))
x = -5/22*((212/5)^(1/2)+4) or x = -5/22*(4-(212/5)^(1/2))
x in { -5/22*((212/5)^(1/2)+4), -5/22*(4-(212/5)^(1/2))}
x in { -5/22*((212/5)^(1/2)+4), -5/22*(4-(212/5)^(1/2)) }
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