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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
5/x+3 = (2/3)*x+19/6 // - (2/3)*x+19/6
5/x-((2/3)*x)-(19/6)+3 = 0
(-2/3)*x+5/x-19/6+3 = 0
5*x^-1-2/3*x^1-1/6*x^0 = 0
(5*x^0-2/3*x^2-1/6*x^1)/(x^1) = 0 // * x^2
x^1*(5*x^0-2/3*x^2-1/6*x^1) = 0
x^1
(-2/3)*x^2+(-1/6)*x+5 = 0
(-2/3)*x^2+(-1/6)*x+5 = 0
DELTA = (-1/6)^2-(4*5*(-2/3))
DELTA = 481/36
DELTA > 0
x = ((481/36)^(1/2)-(-1/6))/(2*(-2/3)) or x = (-(-1/6)-(481/36)^(1/2))/(2*(-2/3))
x = -3/4*((481/36)^(1/2)+1/6) or x = -3/4*(1/6-(481/36)^(1/2))
x in { -3/4*((481/36)^(1/2)+1/6), -3/4*(1/6-(481/36)^(1/2))}
x in { -3/4*((481/36)^(1/2)+1/6), -3/4*(1/6-(481/36)^(1/2)) }
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