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x in (-oo:+oo)
x = (2*x-(3/5))^2 // - (2*x-(3/5))^2
x-(2*x-(3/5))^2 = 0
x-(2*x-3/5)^2 = 0
x-1*(2*x-3/5)^2 = 0
x-1*(2*x-3/5)^2 = 0
17/5*x-4*x^2-9/25 = 0
17/5*x-4*x^2-9/25 = 0
17/5*x-4*x^2-9/25 = 0
DELTA = (17/5)^2-(-4*(-9/25)*4)
DELTA = 29/5
DELTA > 0
x = ((29/5)^(1/2)-17/5)/(-4*2) or x = (-(29/5)^(1/2)-17/5)/(-4*2)
x = ((29/5)^(1/2)-17/5)/(-8) or x = ((29/5)^(1/2)+17/5)/8
(x-(((29/5)^(1/2)-17/5)/(-8)))*(x-(((29/5)^(1/2)+17/5)/8)) = 0
(x-(((29/5)^(1/2)-17/5)/(-8)))*(x-(((29/5)^(1/2)+17/5)/8)) = 0
( x-(((29/5)^(1/2)+17/5)/8) )
x-(((29/5)^(1/2)+17/5)/8) = 0 // + ((29/5)^(1/2)+17/5)/8
x = ((29/5)^(1/2)+17/5)/8
( x-(((29/5)^(1/2)-17/5)/(-8)) )
x-(((29/5)^(1/2)-17/5)/(-8)) = 0 // + ((29/5)^(1/2)-17/5)/(-8)
x = ((29/5)^(1/2)-17/5)/(-8)
x in { ((29/5)^(1/2)+17/5)/8, ((29/5)^(1/2)-17/5)/(-8) }
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