y=x^2+16x+71 equation for parabola
That is the equation for a parabola...
to conver to vertex form, complete the squarey=a(x-h)^2+kvertex is (h,k)y=x^2+16x+71y=(x^2+16x)+7116/2=8, 8^2=64y=(x^2+16x+64-64)+71y=((x+8)^2-64)+71y=(x+8)^2-64+71y=1(x+8)^2+7vertex=(-8,7)