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6*x^2+7*2^(1/2)*x+4 = 0
6*x^2+7*2^(1/2)*x+4 = 0
DELTA = (7*2^(1/2))^2-(4*4*6)
DELTA = 2
DELTA > 0
x = (2^(1/2)-(7*2^(1/2)))/(2*6) or x = (-(7*2^(1/2))-2^(1/2))/(2*6)
x = (-2^(1/2))/2 or x = (-7*2^(1/2)-2^(1/2))/12
x in { (-7*2^(1/2)-2^(1/2))/12, (-2^(1/2))/2 }
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