Question 889167
{{{x=2t-7}}}
{{{x+7=2t}}}
{{{t=(x+7)/2}}}
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{{{f(x)=8((x+7)^2/4)-6((x+7)/2)-11}}}
{{{f(x)=2(x^2+14x+49)-3(x+7)-11}}}
{{{highlight(f(x)=2x^2+25x+66)}}}
{{{f(8)=2(8)^2+25(8)+66}}}
{{{highlight(f(8)=394)}}}