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x in (-oo:+oo)
(1/48)*x^2-(1/16) = 0
(1/48)*x^2-1/16 = 0
1/48*x^2 = 1/16 // : 1/48
x^2 = 3
x^2 = 3 // ^ 1/2
abs(x) = 3^(1/2)
x = 3^(1/2) or x = -3^(1/2)
x in { 3^(1/2), -3^(1/2) }
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