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w in (-oo:+oo)
w^2+(6/3)*w^2+5*w-27 = 0
3*w^2+5*w-27 = 0
DELTA = 5^2-(-27*3*4)
DELTA = 349
DELTA > 0
w = (349^(1/2)-5)/(2*3) or w = (-349^(1/2)-5)/(2*3)
w = (349^(1/2)-5)/6 or w = (-(349^(1/2)+5))/6
w in { (-(349^(1/2)+5))/6, (349^(1/2)-5)/6 }
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