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x in (-oo:+oo)
x^2-((1/2)*x)-(35/16) = 0
x^2+(-1/2)*x-35/16 = 0
x^2-1/2*x-35/16 = 0
DELTA = (-1/2)^2-(-35/16*1*4)
DELTA = 9
DELTA > 0
x = (9^(1/2)+1/2)/(1*2) or x = (1/2-9^(1/2))/(1*2)
x = 7/4 or x = -5/4
x in { -5/4, 7/4 }
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