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D( w )
w = 0
w = 0
w = 0
w in (-oo:0) U (0:+oo)
1/w+5 = w-(3/w)-(1/w) // - w-(3/w)-(1/w)
1/w-w+3/w+1/w+5 = 0
5*w^-1-1*w^1+5*w^0 = 0
(5*w^1-1*w^2+5*w^0)/(w^1) = 0 // * w^2
w^1*(5*w^1-1*w^2+5*w^0) = 0
w^1
5*w-w^2+5 = 0
5*w-w^2+5 = 0
DELTA = 5^2-(-1*4*5)
DELTA = 45
DELTA > 0
w = (45^(1/2)-5)/(-1*2) or w = (-45^(1/2)-5)/(-1*2)
w = (3*5^(1/2)-5)/(-2) or w = (-3*5^(1/2)-5)/(-2)
w in { (3*5^(1/2)-5)/(-2), (-3*5^(1/2)-5)/(-2)}
w in { (3*5^(1/2)-5)/(-2), (-3*5^(1/2)-5)/(-2) }
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