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w in (-oo:+oo)
(w/2)*w-3 = 4/3 // - 4/3
(w/2)*w-(4/3)-3 = 0
(w/2)*w-4/3-3 = 0
1/2*w^2 = 13/3 // : 1/2
w^2 = 26/3
w^2 = 26/3 // ^ 1/2
abs(w) = (26/3)^(1/2)
w = (26/3)^(1/2) or w = -(26/3)^(1/2)
w in { (26/3)^(1/2), -(26/3)^(1/2) }
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