Answer
$-\dfrac{1}{4}$
Work Step by Step
$\dfrac{z}{z^{2}-5};$ $z=-5$
Replace $z$ with $-5$ and evaluate the operations:
$\dfrac{-5}{(-5)^{2}-5}=\dfrac{-5}{25-5}=\dfrac{-5}{20}=-\dfrac{1}{4}$
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