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(x^2)/6-(8*x) = 0
(x^2)/6-8*x = 0
1/6*x^2-8*x = 0
DELTA = (-8)^2-(0*1/6*4)
DELTA = 64
DELTA > 0
x = (64^(1/2)+8)/(1/6*2) or x = (8-64^(1/2))/(1/6*2)
x = 48 or x = 0
x in { 0, 48 }
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