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x in (-oo:+oo)
x^2-(5*x) = ((3*x)^1)/2 // - ((3*x)^1)/2
x^2-(5*x)-(((3*x)^1)/2) = 0
x^2-5*x+(-3/2)*x = 0
x^2-13/2*x = 0
DELTA = (-13/2)^2-(0*1*4)
DELTA = 169/4
DELTA > 0
x = ((169/4)^(1/2)+13/2)/(1*2) or x = (13/2-(169/4)^(1/2))/(1*2)
x = 13/2 or x = 0
x in { 0, 13/2 }
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