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D( w )
w = 0
w = 0
w = 0
w in (-oo:0) U (0:+oo)
-2/w-10 = 2*w+6/4 // - 2*w+6/4
-(2*w)-2/w-(6/4)-10 = 0
-2*w-2/w-3/2-10 = 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
(-23/2)*w-2*w^2-2 = 0
(-23/2)*w-2*w^2-2 = 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 = (23/2-(465/4)^(1/2))/(-4)
w in { ((465/4)^(1/2)+23/2)/(-4), (23/2-(465/4)^(1/2))/(-4)}
w in { ((465/4)^(1/2)+23/2)/(-4), (23/2-(465/4)^(1/2))/(-4) }
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