Question 636053
{{{f(x)=x^2+2x-9 }}}
{{{f(-8)=(-8)^2+2*(-8)-9 =64-16-9=39}}}
{{{f(x+5)=(x+5)^2+2(x+5)-9=x^2+10x+25+2x+10-9=x^2+12x+26}}}