Michael J. answered 06/23/17
Tutor
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Effective High School STEM Tutor & CUNY Math Peer Leader
First, get y in vertex form.
y = (x2 + 2x + 1) + 2 - 1
y = (x + 1)2 + 1
Vertex is (-1, 1).
New vertex is (-1 + 3 , 1 - 2) = (2, -1)
f(x) = (x - 2)2 - 1
f(x) = x2 - 4x + 3