How do you write y=2x212x+11 into vertex form?

1 Answer
May 29, 2015

The general vertex form for a quadratic is
y=m(xa)+b where (a,b) is the vertex.

y=2x212x+11
XXXXextract the m
y=2(x26x)+11
XXXXcomplete the square
y=2(x26x+9)+1118
XXXXsimplify to vertex form
y=2(x3)2+(7)
XXXXwith the vertex at (3,7)