#### Answer

$(-1,5)$.

#### Work Step by Step

If the equation of a quadratic function is $f(x)=\pm(x-k)^2+m$. Then the vertex of the function is at $(k,m)$.
Hence here the vertex is $(-1,5)$.

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Published by
Pearson

ISBN 10:
0-13417-894-7

ISBN 13:
978-0-13417-894-3

$(-1,5)$.

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