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x in (-oo:+oo)
5*p = ((11/2)*x^2)/3 // - ((11/2)*x^2)/3
5*p-(((11/2)*x^2)/3) = 0
5*p+(-11/6)*x^2 = 0
-11/6*x^2 = -(5*p) // : -11/6
x^2 = 30/11*p
x^2 = 30/11*p // ^ 1/2
abs(x) = (30/11)^(1/2)*p^(1/2)
x = (30/11)^(1/2)*p^(1/2) or x = -((30/11)^(1/2)*p^(1/2))
x in { (30/11)^(1/2)*p^(1/2), -((30/11)^(1/2)*p^(1/2)) }
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