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x in (-oo:+oo)
(1/16)*x^2+(1/2)*x+3/4+0 = 0
(1/16)*x^2+(1/2)*x+3/4 = 0
1/16*x^2+1/2*x+3/4 = 0
DELTA = (1/2)^2-(1/16*3/4*4)
DELTA = 1/16
DELTA > 0
x = ((1/16)^(1/2)-1/2)/(1/16*2) or x = (-(1/16)^(1/2)-1/2)/(1/16*2)
x = -2 or x = -6
x in { -6, -2 }
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