Question 1000845
{{{y=a(x-h)^2)+k}}}


{{{y=3x^2-12x+5}}} 

{{{y=(3x^2-12x)+5}}}

{{{y=3(x^2-4x+b^2)-3b^2+5}}}

{{{y=3(x^2-4x+2^2)-3*2^2+5}}}

{{{y=3(x-2)^2)-3*4+5}}}

{{{y=3(x-2)^2)-12+5}}}

{{{y=3(x-2)^2)-7}}}

=>{{{h=2}}} and {{{k=-7}}}
vertex is at:({{{2}}},{{{-7}}})

{{{drawing( 600, 600, -10, 10, -10, 10,
circle(2,-7,.12),locate(2,-7,V(2,-7)),
 graph( 600, 600, -10, 10, -10, 10, 3x^2-12x+5)) }}}