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(4*x^2)/3.5-x-(5.52*10^-6) = 0
(4*x^2)/3.5-x-5.52*10^-6 = 0
1.14285714*x^2-x-0.00000552 = 0
DELTA = (-1)^2-(-0.00000552*1.14285714*4)
DELTA = 1.0000252342856512
DELTA > 0
x = (1.0000252342856512^(1/2)+1)/(1.14285714*2) or x = (1-1.0000252342856512^(1/2))/(1.14285714*2)
x = 0.4375*(1.0000252342856512^(1/2)+1) or x = 0.4375*(1-1.0000252342856512^(1/2))
x in { 0.4375*(1-1.0000252342856512^(1/2)), 0.4375*(1.0000252342856512^(1/2)+1) }
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