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D( w )
w = 0
w = 0
w = 0
w in (-oo:0) U (0:+oo)
6/w-5+3 = 2*w-(2/w)+3 // - 2*w-(2/w)+3
6/w-(2*w)+2/w-5-3+3 = 0
6/w-2*w+2/w-5-3+3 = 0
8*w^-1-2*w^1-5*w^0 = 0
(8*w^0-2*w^2-5*w^1)/(w^1) = 0 // * w^2
w^1*(8*w^0-2*w^2-5*w^1) = 0
w^1
8-2*w^2-5*w = 0
8-2*w^2-5*w = 0
DELTA = (-5)^2-(-2*4*8)
DELTA = 89
DELTA > 0
w = (89^(1/2)+5)/(-2*2) or w = (5-89^(1/2))/(-2*2)
w = (89^(1/2)+5)/(-4) or w = (5-89^(1/2))/(-4)
w in { (89^(1/2)+5)/(-4), (5-89^(1/2))/(-4)}
w in { (89^(1/2)+5)/(-4), (5-89^(1/2))/(-4) }
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