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x^2-((15/6)*x^2)-(2*x)-54 = 0
x^2+(-5/2)*x^2-2*x-54 = 0
-3/2*x^2-2*x-54 = 0
DELTA = (-2)^2-(-54*(-3/2)*4)
DELTA = -320
DELTA < 0
x belongs to the empty set
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