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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
1/x+1/2-2 = x/16 // - x/16
1/x-(x/16)+1/2-2 = 0
1*x^-1-1/16*x^1-3/2*x^0 = 0
(1*x^0-1/16*x^2-3/2*x^1)/(x^1) = 0 // * x^2
x^1*(1*x^0-1/16*x^2-3/2*x^1) = 0
x^1
(-1/16)*x^2+(-3/2)*x+1 = 0
(-1/16)*x^2+(-3/2)*x+1 = 0
DELTA = (-3/2)^2-(1*4*(-1/16))
DELTA = 5/2
DELTA > 0
x = ((5/2)^(1/2)-(-3/2))/(2*(-1/16)) or x = (-(-3/2)-(5/2)^(1/2))/(2*(-1/16))
x = -8*((5/2)^(1/2)+3/2) or x = -8*(3/2-(5/2)^(1/2))
x in { -8*((5/2)^(1/2)+3/2), -8*(3/2-(5/2)^(1/2))}
x in { -8*((5/2)^(1/2)+3/2), -8*(3/2-(5/2)^(1/2)) }
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