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w in (-oo:+oo)
w^2-((2/4)*w^2)-w-16 = 0
w^2+(-1/2)*w^2-w-16 = 0
1/2*w^2-w-16 = 0
DELTA = (-1)^2-(-16*1/2*4)
DELTA = 33
DELTA > 0
w = (33^(1/2)+1)/(1/2*2) or w = (1-33^(1/2))/(1/2*2)
w = 33^(1/2)+1 or w = 1-33^(1/2)
w in { 1-33^(1/2), 33^(1/2)+1 }
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