Question 355098
{{{m(x)=-x^2+6x-4}}}
{{{m(x)=-(x^2-6x)-4}}}
{{{m(x)=-(x^2-6x+9)-4+9}}}
{{{m(x)=-(x-3)^2+5}}}
The vertex is ({{{3}}},{{{5}}}).
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{{{drawing(300,300,-8,8,-8,8,circle(3,5,0.2),grid(1),graph(300,300,-8,8,-8,8,-x^2+6x-4))}}}