\[\sqrt{\left( 8 - \sqrt{11} \right)^{2}} + \sqrt{\left( 3 - \sqrt{11} \right)^{2}} =\]
\[= \left| 8 - \sqrt{11} \right| + \left| 3 - \sqrt{11} \right| =\]
\[= 8 - \sqrt{11} + \left( \sqrt{11} - 3 \right) =\]
\[= 8 - \sqrt{11} + \sqrt{11} - 3 = 5\]