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x in (-oo:+oo)
x^2-(3*x) = 3/4 // - 3/4
x^2-(3*x)-(3/4) = 0
x^2-3*x-3/4 = 0
x^2-3*x-3/4 = 0
DELTA = (-3)^2-(-3/4*1*4)
DELTA = 12
DELTA > 0
x = (12^(1/2)+3)/(1*2) or x = (3-12^(1/2))/(1*2)
x = (2*3^(1/2)+3)/2 or x = (3-2*3^(1/2))/2
x in { (3-2*3^(1/2))/2, (2*3^(1/2)+3)/2 }
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