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(x^2)/16-(2*x) = 0
(x^2)/16-2*x = 0
1/16*x^2-2*x = 0
DELTA = (-2)^2-(0*1/16*4)
DELTA = 4
DELTA > 0
x = (4^(1/2)+2)/(1/16*2) or x = (2-4^(1/2))/(1/16*2)
x = 32 or x = 0
x in { 0, 32 }
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