$$\left. \begin{array} { l } { ( 2 a ^ { 2 } - 5 ) = 15 } \\ { ( 2 a + 2 ) ( 2 \cdot \frac { 3 } { n - 2 } + 1 - 5 ) = 16 } \\ { n + 2 ) ( } \end{array} \right.$$
$a=\sqrt{10}\approx 3.16227766\text{, }n=\frac{25}{2}-3\sqrt{10}\approx 3.013167019\text{, }o=\frac{29}{2}-3\sqrt{10}\approx 5.013167019$
$a=-\sqrt{10}\approx -3.16227766\text{, }n=3\sqrt{10}+\frac{25}{2}\approx 21.986832981\text{, }o=3\sqrt{10}+\frac{29}{2}\approx 23.986832981$
