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x in (-oo:+oo)
(x^2)/2-(0.25*x)+0.75 = 0
(x^2)/2-0.25*x+0.75 = 0
1/2*x^2-0.25*x+0.75 = 0
DELTA = (-0.25)^2-(1/2*0.75*4)
DELTA = 0.25^2-1.5
DELTA = -1.4375
DELTA < 0
x belongs to the empty set
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