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5*x^2-(203/3) = 2*x // - 2*x
5*x^2-(2*x)-(203/3) = 0
5*x^2-2*x-203/3 = 0
5*x^2-2*x-203/3 = 0
DELTA = (-2)^2-(-203/3*4*5)
DELTA = 4072/3
DELTA > 0
x = ((4072/3)^(1/2)+2)/(2*5) or x = (2-(4072/3)^(1/2))/(2*5)
x = ((4072/3)^(1/2)+2)/10 or x = (2-(4072/3)^(1/2))/10
x in { (2-(4072/3)^(1/2))/10, ((4072/3)^(1/2)+2)/10 }
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