Hannah H.

asked • 06/05/15

Help me please?

Convert y=x^2+7x-8 in to vertex form

1 Expert Answer

By:

Mark M. answered • 06/05/15

Tutor
5.0 (278)

Mathematics Teacher - NCLB Highly Qualified

See tutors like this
See tutors like this
Conversion into vertex form is done by completion of the square
 
y = x2 + 7x                    - 8
y = x2 + 7x + (7/2)2      - 8 - (7/2)2
y = (x + 7/2)2 - 8 - 49/4
y = (x + 7/2)2 - 81/4
 
Vertex (-7/2, -81/4)
Upvote • 0 Downvote
More
Report

Andrew M.

Note that the vertex form of a parabolic equation is
y = a(x-h)2+k
with vertex being at (h,k)
 
This is why you need to complete the square to work the problem as Mark M. did
Report

06/05/15

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.