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D( w )
w = 0
w = 0
w = 0
w in (-oo:0) U (0:+oo)
8/w-4*w-2 = 0
8*w^-1-4*w^1-2*w^0 = 0
(8*w^0-4*w^2-2*w^1)/(w^1) = 0 // * w^2
w^1*(8*w^0-4*w^2-2*w^1) = 0
w^1
8-4*w^2-2*w = 0
8-4*w^2-2*w = 0
DELTA = (-2)^2-(-4*4*8)
DELTA = 132
DELTA > 0
w = (132^(1/2)+2)/(-4*2) or w = (2-132^(1/2))/(-4*2)
w = (2*33^(1/2)+2)/(-8) or w = (2-2*33^(1/2))/(-8)
w in { (2*33^(1/2)+2)/(-8), (2-2*33^(1/2))/(-8)}
w in { (2*33^(1/2)+2)/(-8), (2-2*33^(1/2))/(-8) }
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