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w in (-oo:+oo)
6*w^2-(((8*w)/3)*w)-4 = 0
6*w^2+(-8/3)*w^2-4 = 0
10/3*w^2 = 4 // : 10/3
w^2 = 6/5
w^2 = 6/5 // ^ 1/2
abs(w) = (6/5)^(1/2)
w = (6/5)^(1/2) or w = -(6/5)^(1/2)
w in { (6/5)^(1/2), -(6/5)^(1/2) }
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