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D( w )
w = 0
w = 0
w = 0
w in (-oo:0) U (0:+oo)
4-8/w = (-3/4)*w+2+16 // - (-3/4)*w+2+16
4-((-3/4)*w)-8/w-16-2 = 0
(3/4)*w-8/w-16-2+4 = 0
3/4*w^1-8*w^-1-14*w^0 = 0
(3/4*w^2-14*w^1-8*w^0)/(w^1) = 0 // * w^2
w^1*(3/4*w^2-14*w^1-8*w^0) = 0
w^1
(3/4)*w^2-14*w-8 = 0
(3/4)*w^2-14*w-8 = 0
DELTA = (-14)^2-(-8*4*(3/4))
DELTA = 220
DELTA > 0
w = (220^(1/2)+14)/(2*(3/4)) or w = (14-220^(1/2))/(2*(3/4))
w = 2/3*(2*55^(1/2)+14) or w = 2/3*(14-2*55^(1/2))
w in { 2/3*(14-2*55^(1/2)), 2/3*(2*55^(1/2)+14)}
w in { 2/3*(14-2*55^(1/2)), 2/3*(2*55^(1/2)+14) }
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