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(-1*x^2)/(-10)+(9*x)/10+11/5 = 0
(-x^2)/(-10)+(9*x)/10+11/5 = 0
1/10*x^2+9/10*x+11/5 = 0
DELTA = (9/10)^2-(1/10*11/5*4)
DELTA = -7/100
DELTA < 0
x belongs to the empty set
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