\[f(x) = \frac{5}{x² - |x|}\ \]
\[x^{2} - |x| \neq 0\]
\[x \neq 0\ \ \]
\[x \neq \pm 1\]
\[\Longrightarrow D(f) =\]
\[= ( - \infty; - 1) \cup ( - 1;1) \cup (1; + \infty).\]