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a in (-oo:+oo)
(3/2)*a-(8*a^2)-((1/4)*a)-(4/8)-4+2 = 0
(3/2)*a-8*a^2+(-1/4)*a-1/2-4+2 = 0
5/4*a-8*a^2-5/2 = 0
DELTA = (5/4)^2-(-8*(-5/2)*4)
DELTA = -1255/16
DELTA < 0
a belongs to the empty set
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