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w in (-oo:+oo)
w^2-(5*w) = 11/4 // - 11/4
w^2-(5*w)-(11/4) = 0
w^2-5*w-11/4 = 0
w^2-5*w-11/4 = 0
DELTA = (-5)^2-(-11/4*1*4)
DELTA = 36
DELTA > 0
w = (36^(1/2)+5)/(1*2) or w = (5-36^(1/2))/(1*2)
w = 11/2 or w = -1/2
w in { -1/2, 11/2 }
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