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The graph of one of the given functions has exactly two $x$-intercepts, which is it?

A

$f(x) = (x-4)(x+4) + 17$

B

$f(x) = x^2+6x+9$

C

$f(x) = 5x^2 + 3x - 1$

D

$f(x) = -2(x+3)^2-1$

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