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6*x^2-(13*x)-((23/2)*x)-7 = 0
6*x^2-13*x+(-23/2)*x-7 = 0
6*x^2-49/2*x-7 = 0
DELTA = (-49/2)^2-(-7*4*6)
DELTA = 3073/4
DELTA > 0
x = ((3073/4)^(1/2)+49/2)/(2*6) or x = (49/2-(3073/4)^(1/2))/(2*6)
x = ((3073/4)^(1/2)+49/2)/12 or x = (49/2-(3073/4)^(1/2))/12
x in { (49/2-(3073/4)^(1/2))/12, ((3073/4)^(1/2)+49/2)/12 }
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