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x in (-oo:+oo)
x+2/14 = x^2-(23/4) // - x^2-(23/4)
x-x^2+2/14+23/4 = 0
x-x^2+165/28 = 0
DELTA = 1^2-(-1*4*165/28)
DELTA = 172/7
DELTA > 0
x = ((172/7)^(1/2)-1)/(-1*2) or x = (-(172/7)^(1/2)-1)/(-1*2)
x = ((172/7)^(1/2)-1)/(-2) or x = ((172/7)^(1/2)+1)/2
x in { ((172/7)^(1/2)-1)/(-2), ((172/7)^(1/2)+1)/2 }
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