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x in (-oo:+oo)
6*x^2-x-(3*x)-(2/2) = 1 // - 1
6*x^2-x-(3*x)-(2/2)-1 = 0
6*x^2-x-3*x-1-1 = 0
6*x^2-4*x-2 = 0
DELTA = (-4)^2-(-2*4*6)
DELTA = 64
DELTA > 0
x = (64^(1/2)+4)/(2*6) or x = (4-64^(1/2))/(2*6)
x = 1 or x = -1/3
x in { -1/3, 1 }
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