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x in (-oo:+oo)
-(-3*x^2-((3/5)*x)-5) = 0
-((-3/5)*x-3*x^2-5) = 0
3*x^2+3/5*x+5 = 0
DELTA = (3/5)^2-(3*4*5)
DELTA = -1491/25
DELTA < 0
x belongs to the empty set
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