Question 698410


The standard form of a parabola's equation is generally expressed:

    {{{y = ax^2 + bx + c}}}


The vertex form of a parabola's equation is generally expressed as :

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


{{{y=x^2-8x-87}}}....write {{{-87}}} as {{{16-103}}} to complete square

{{{y=x^2-8x+16-103}}}

{{{y=(x^2-8x+4^2)-103}}}

{{{y=(x-4)^2-103}}}

answer is:

 c. {{{y+103=(x-4)^2}}} or {{{y=(x-4)^2 -103}}}