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D( w )
2*w-3 = 0
w = 0
2*w-3 = 0
2*w-3 = 0
2*w-3 = 0 // + 3
2*w = 3 // : 2
w = 3/2
w = 0
w = 0
w in (-oo:0) U (0:3/2) U (3/2:+oo)
w/(2*w-3) = 4/w // - 4/w
w/(2*w-3)-(4/w) = 0
w/(2*w-3)-4*w^-1 = 0
w/(2*w-3)-4/w = 0
(w^2)/(w*(2*w-3))+(-4*(2*w-3))/(w*(2*w-3)) = 0
w^2-4*(2*w-3) = 0
w^2-8*w+12 = 0
w^2-8*w+12 = 0
w^2-8*w+12 = 0
DELTA = (-8)^2-(1*4*12)
DELTA = 16
DELTA > 0
w = (16^(1/2)+8)/(1*2) or w = (8-16^(1/2))/(1*2)
w = 6 or w = 2
(w-2)*(w-6) = 0
((w-2)*(w-6))/(w*(2*w-3)) = 0
((w-2)*(w-6))/(w*(2*w-3)) = 0 // * w*(2*w-3)
(w-2)*(w-6) = 0
( w-2 )
w-2 = 0 // + 2
w = 2
( w-6 )
w-6 = 0 // + 6
w = 6
w in { 2, 6 }
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