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q in (-oo:+oo)
(31/4)*q^2+6*q-76 = 0
31/4*q^2+6*q-76 = 0
DELTA = 6^2-(-76*4*31/4)
DELTA = 2392
DELTA > 0
q = (2392^(1/2)-6)/(2*31/4) or q = (-2392^(1/2)-6)/(2*31/4)
q = 2/31*(2*598^(1/2)-6) or q = 2/31*(-2*598^(1/2)-6)
q in { 2/31*(-2*598^(1/2)-6), 2/31*(2*598^(1/2)-6) }
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