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x in (-oo:+oo)
8*x^2+18*x+(4/4)*x+3 = 0
8*x^2+19*x+3 = 0
DELTA = 19^2-(3*4*8)
DELTA = 265
DELTA > 0
x = (265^(1/2)-19)/(2*8) or x = (-265^(1/2)-19)/(2*8)
x = (265^(1/2)-19)/16 or x = (-(265^(1/2)+19))/16
x in { (-(265^(1/2)+19))/16, (265^(1/2)-19)/16 }
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