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x in (-oo:+oo)
x^2-((52/9)*x) = 62/9 // - 62/9
x^2-((52/9)*x)-(62/9) = 0
x^2+(-52/9)*x-62/9 = 0
x^2-52/9*x-62/9 = 0
DELTA = (-52/9)^2-(-62/9*1*4)
DELTA = 4936/81
DELTA > 0
x = ((4936/81)^(1/2)+52/9)/(1*2) or x = (52/9-(4936/81)^(1/2))/(1*2)
x = ((4936/81)^(1/2)+52/9)/2 or x = (52/9-(4936/81)^(1/2))/2
x in { (52/9-(4936/81)^(1/2))/2, ((4936/81)^(1/2)+52/9)/2 }
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