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D( w )
6*w^2-(54*w)+180 = 0
6*w^2-(54*w)+180 = 0
6*w^2-(54*w)+180 = 0
6*w^2-54*w+180 = 0
6*w^2-54*w+180 = 0
DELTA = (-54)^2-(4*6*180)
DELTA = -1404
DELTA < 0
w in (-oo:+oo)
(w^2-(5*w)+6)/(6*w^2-(54*w)+180) = 0
(w^2-5*w+6)/(6*w^2-54*w+180) = 0
w^2-5*w+6 = 0
w^2-5*w+6 = 0
DELTA = (-5)^2-(1*4*6)
DELTA = 1
DELTA > 0
w = (1^(1/2)+5)/(1*2) or w = (5-1^(1/2))/(1*2)
w = 3 or w = 2
(w-2)*(w-3) = 0
6*w^2-54*w+180 = 0
6*(w^2-9*w+30) = 0
w^2-9*w+30 = 0
DELTA = (-9)^2-(1*4*30)
DELTA = -39
DELTA < 0
6 = 0
((w-2)*(w-3))/6 = 0
( w-2 )
w-2 = 0 // + 2
w = 2
( w-3 )
w-3 = 0 // + 3
w = 3
w in { 2, 3 }
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