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D( w )
w = 0
w = 0
w = 0
w in (-oo:0) U (0:+oo)
234/w = w+6 // - w+6
234/w-w-6 = 0
234*w^-1-1*w^1-6*w^0 = 0
(234*w^0-1*w^2-6*w^1)/(w^1) = 0 // * w^2
w^1*(234*w^0-1*w^2-6*w^1) = 0
w^1
234-w^2-6*w = 0
234-w^2-6*w = 0
DELTA = (-6)^2-(-1*4*234)
DELTA = 972
DELTA > 0
w = (972^(1/2)+6)/(-1*2) or w = (6-972^(1/2))/(-1*2)
w = (18*3^(1/2)+6)/(-2) or w = (6-18*3^(1/2))/(-2)
w in { (18*3^(1/2)+6)/(-2), (6-18*3^(1/2))/(-2)}
w in { (18*3^(1/2)+6)/(-2), (6-18*3^(1/2))/(-2) }
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