Question 635849
{{{y = x^2 - 8x + 3}}}

The vertex form of a parabola's equation is generally expressed as :
{{{y= a(x-h)^2+k }}}



{{{y = (x^2 -8x + 16) + (3 - 16)}}}    (complete the square)

{{{y = (x - 4)^2-13}}} ......the vertex form

the vertex is ({{{h=4}}}, {{{k=-13}}})


{{{ graph( 600, 600, -15, 15, -15, 15, x^2 - 8x + 3) }}}