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w in (-oo:+oo)
w^2-(4*w^2)-(2*w)+1/4 = 0
w^2-4*w^2-2*w+1/4 = 0
1/4-3*w^2-2*w = 0
DELTA = (-2)^2-(-3*1/4*4)
DELTA = 7
DELTA > 0
w = (7^(1/2)+2)/(-3*2) or w = (2-7^(1/2))/(-3*2)
w = (7^(1/2)+2)/(-6) or w = (2-7^(1/2))/(-6)
w in { (7^(1/2)+2)/(-6), (2-7^(1/2))/(-6) }
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