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X in (-oo:+oo)
(2*X^2)/3+(3*X^1)/3-2 = 0
(2*X^2)/3+(3*X)/3-2 = 0
2/3*X^2+X-2 = 0
DELTA = 1^2-(-2*2/3*4)
DELTA = 19/3
DELTA > 0
X = ((19/3)^(1/2)-1)/(2/3*2) or X = (-(19/3)^(1/2)-1)/(2/3*2)
X = 3/4*((19/3)^(1/2)-1) or X = -3/4*((19/3)^(1/2)+1)
X in { -3/4*((19/3)^(1/2)+1), 3/4*((19/3)^(1/2)-1) }
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