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x in (-oo:+oo)
t = (p-h-64*t^2)/(-b) // - (p-h-64*t^2)/(-b)
t-((p-h-64*t^2)/(-b)) = 0
b^-1*(p-h-64*t^2)+t = 0
b^-1*(p-h-64*t^2)+t = 0
b^-1*p-(b^-1*h)-64*b^-1*t^2+t = 0
b^-1*p-(b^-1*h)-64*b^-1*t^2+t = 0
x belongs to the empty set
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