Question 356950
{{{f(x) = 2(x^2+x/2)-6}}},
{{{f(x) = 2(x^2+x/2+1/16)-6-2/16}}},
{{{f(x) = 2(x+1/4)^2-6-1/8}}},
{{{f(x) = 2(x+1/4)^2-49/8}}}.