Question 839761
{{{f(x)=a(x-3)^2+b}}}
{{{f(3)=a(3-3)^2+b=0+b=7}}}
{{{b=7}}}
{{{f(-1)=a(-1-3)^2+7=-25}}}
{{{a(-4)^2+7=-25}}}
{{{16a+7=-25}}}
{{{16a=-32}}}
{{{a=-2}}}
{{{highlight_green(f(x)=-2(x-3)^2+7)}}}