F(x)=x2+8x+7

(find the vertex. I tried -b/2a but I need an x and y coordinate answer and it only worked for x! How do I find y? I did -b/2a for y too but it wasn't the right answer.):)

Question

F(x)=x2+8x+7

(find the vertex. I tried -b/2a but I need an x and y coordinate answer and it only worked for x! How do I find y? I did -b/2a for y too but it wasn't the right answer.):)

anonymous · Answer

hi i just answered this question in your previous post.  i worked out the details there

anonymous · Answer

http://openstudy.com/groups/mathematics#/groups/mathematics/updates/4de6e2db4c0e8b0b113bb7d8

anonymous · Answer

it is the x - value that uses $$-\frac{b}{2a}$$