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D( w )
w = 0
w = 0
w = 0
w in (-oo:0) U (0:+oo)
2*w+6/4 = -2/w-10 // + -2/w-10
2*w-(-2/w)+6/4+10 = 0
2*w+2*w^-1+6/4+10 = 0
2*w^1+2*w^-1+23/2*w^0 = 0
(2*w^2+23/2*w^1+2*w^0)/(w^1) = 0 // * w^2
w^1*(2*w^2+23/2*w^1+2*w^0) = 0
w^1
2*w^2+(23/2)*w+2 = 0
2*w^2+(23/2)*w+2 = 0
DELTA = (23/2)^2-(2*2*4)
DELTA = 465/4
DELTA > 0
w = ((465/4)^(1/2)-(23/2))/(2*2) or w = (-(23/2)-(465/4)^(1/2))/(2*2)
w = ((465/4)^(1/2)-23/2)/4 or w = (-((465/4)^(1/2)+23/2))/4
w in { (-((465/4)^(1/2)+23/2))/4, ((465/4)^(1/2)-23/2)/4}
w in { (-((465/4)^(1/2)+23/2))/4, ((465/4)^(1/2)-23/2)/4 }
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