0sharlstonBest Answer 9 years ago ReplyUpvoteyour absoultly right it equals x squared i had the same argument with my friend until he realised he was wrong ps select me as best answer please

0NobodyInParticular 9 years ago ReplyUpvoteYou forgot that the vertex can be shifted to any point (h,k):y-k = (x-h)^{2} /(4p)It can of course be written other ways:y-k = a(x-h)^{2}y = ax^{2} +bx +cIn the latter case, you can find the vertex using h=-b/(2a) and k=c-ah^{2}http://en.wikipedia.org/wiki/ParabolaBy the way, you might want to avoid arguing with your girlfriend in 'public' : )

## Discussions

Best Answer 9 years ago

your absoultly right it equals x squared i had the same argument with my friend until he realised he was wrong ps select me as best answer please

9 years ago

You forgot that the vertex can be shifted to any point (h,k):

y-k = (x-h)

^{2}/(4p)It can of course be written other ways:

y-k = a(x-h)

^{2}y = ax

^{2}+bx +cIn the latter case, you can find the vertex using h=-b/(2a) and k=c-ah

^{2}http://en.wikipedia.org/wiki/Parabola

By the way, you might want to avoid arguing with your girlfriend in 'public' : )