Question 888530
Convert to vertex form,
{{{y=x^2+bx+c}}}
{{{y=(x^2+bx+b^2/4)+c-b^2/4}}}
{{{y=(x+b/2)^2+(c-b^2/4)}}}
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{{{-b/2=4}}}
{{{b=-8}}}
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{{{c-b^2/4=9}}}
{{{c-64/4=9}}}
{{{c-16=9}}}
{{{c=25}}}