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