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D( w )
w = 0
w = 0
w = 0
w in (-oo:0) U (0:+oo)
1/w-((3/4)*w)-1+4 = (1/4)*w-4 // - (1/4)*w-4
1/w-((3/4)*w)-((1/4)*w)-1+4+4 = 0
(-3/4)*w+(-1/4)*w+1/w-1+4+4 = 0
1*w^-1-1*w^1+7*w^0 = 0
(7*w^1-1*w^2+1*w^0)/(w^1) = 0 // * w^2
w^1*(7*w^1-1*w^2+1*w^0) = 0
w^1
7*w-w^2+1 = 0
7*w-w^2+1 = 0
DELTA = 7^2-(-1*1*4)
DELTA = 53
DELTA > 0
w = (53^(1/2)-7)/(-1*2) or w = (-53^(1/2)-7)/(-1*2)
w = (53^(1/2)-7)/(-2) or w = (53^(1/2)+7)/2
w in { (53^(1/2)-7)/(-2), (53^(1/2)+7)/2}
w in { (53^(1/2)-7)/(-2), (53^(1/2)+7)/2 }
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