\[\frac{2n^{3} - 7n^{2} - 48}{n^{2}} =\]
\[= \frac{n^{2}(2n - 7) - 48}{n^{2}} =\]
\[= \frac{n^{2}(2n - 7)}{n^{2}} - \frac{48}{n^{2}} =\]
\[= 2n - 7 - \frac{48}{n^{2}} \Longrightarrow n^{2} = 4;\]
\[16,\ тогда:\]
\[при\ n = \pm 2;\ \pm 4.\]