Respuesta :

HomertheGenius
There must be added one zero pair: -9, 9.
f (x) = x² - 6 x + 9 - 9 + 1 = ( x² - 6 x + 9 ) - 8 =
=( x - 3 )² - 8 ( the vertex form)

Answer:

the answer is 8

Step-by-step explanation:

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