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