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x in (-oo:+oo)
(x^2)/2+(5*x)/4 = -3/4 // + -3/4
(x^2)/2+(5*x)/4-(-3/4) = 0
(x^2)/2+(5*x)/4+3/4 = 0
1/2*x^2+5/4*x+3/4 = 0
DELTA = (5/4)^2-(1/2*3/4*4)
DELTA = 1/16
DELTA > 0
x = ((1/16)^(1/2)-5/4)/(1/2*2) or x = (-(1/16)^(1/2)-5/4)/(1/2*2)
x = -1 or x = -3/2
x in { -3/2, -1 }
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