Question

Need help please (: medal + fan
(attached image)

Answer 1

If you need a refresher on completing the square, try:
http://www.purplemath.com/modules/sqrquad.htm

The second question can be answered once you put the function into the form
y=a(x-h)^2+k
where x=h is the line of symmetry.

Answer 2

Oh ik what that is but i dont get how to do it.