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6*x^2-((12/5)*x)-4 = 0
6*x^2+(-12/5)*x-4 = 0
6*x^2-12/5*x-4 = 0
DELTA = (-12/5)^2-(-4*4*6)
DELTA = 2544/25
DELTA > 0
x = ((2544/25)^(1/2)+12/5)/(2*6) or x = (12/5-(2544/25)^(1/2))/(2*6)
x = ((2544/25)^(1/2)+12/5)/12 or x = (12/5-(2544/25)^(1/2))/12
x in { (12/5-(2544/25)^(1/2))/12, ((2544/25)^(1/2)+12/5)/12 }
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