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x in (-oo:+oo)
(-1/4)*x^2-(((1/1)/4)*x)-450 = 0
(-1/4)*x^2+(-1/4)*x-450 = 0
-1/4*x^2-1/4*x-450 = 0
DELTA = (-1/4)^2-(-450*(-1/4)*4)
DELTA = -7199/16
DELTA < 0
x belongs to the empty set
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