Answer
Vertical asymptotes at $x=8$ and $x=-8.$
Work Step by Step
A function has vertical asymptotes at values that make only the denominator $0$.
$g(x)=\dfrac{2x+1}{x^2-64}=\dfrac{2x+1}{(x-8)(x+8)}\to(x-8)(x+8)=0\to x=8$ or $x=-8.$
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