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x in (-oo:+oo)
x^2-(x/4)-(35/64) = 0
x^2-(x/4)-35/64 = 0
x^2-1/4*x-35/64 = 0
DELTA = (-1/4)^2-(-35/64*1*4)
DELTA = 9/4
DELTA > 0
x = ((9/4)^(1/2)+1/4)/(1*2) or x = (1/4-(9/4)^(1/2))/(1*2)
x = 7/8 or x = -5/8
x in { -5/8, 7/8 }
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