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Which of the following is a complete list of zeros for the polynomial function $f(x)=9-7x-2{ x }^{ 2 }$?

A

$-\cfrac {2}{9},-1$

B

$-\cfrac {2}{9},1$

C

$-\cfrac {9}{2},-1$

D

$-\cfrac {9}{2},1$

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