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3*x^2-((2/3)*x)-6 = 0
3*x^2+(-2/3)*x-6 = 0
3*x^2-2/3*x-6 = 0
DELTA = (-2/3)^2-(-6*3*4)
DELTA = 652/9
DELTA > 0
x = ((652/9)^(1/2)+2/3)/(2*3) or x = (2/3-(652/9)^(1/2))/(2*3)
x = ((652/9)^(1/2)+2/3)/6 or x = (2/3-(652/9)^(1/2))/6
x in { (2/3-(652/9)^(1/2))/6, ((652/9)^(1/2)+2/3)/6 }
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