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x in (-oo:+oo)
x^2-(3*x) = 187/4 // - 187/4
x^2-(3*x)-(187/4) = 0
x^2-3*x-187/4 = 0
x^2-3*x-187/4 = 0
DELTA = (-3)^2-(-187/4*1*4)
DELTA = 196
DELTA > 0
x = (196^(1/2)+3)/(1*2) or x = (3-196^(1/2))/(1*2)
x = 17/2 or x = -11/2
x in { -11/2, 17/2 }
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