Answer
$$-\sqrt{16}+\sqrt{-72}+\sqrt{121}+\sqrt{-2}=-4+\sqrt{-72}+11+\sqrt{2}\cdot i$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}-\sqrt{16}+\sqrt{-72}+\sqrt{121}+\sqrt{-2}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-4+\sqrt{-72}+11+\sqrt{-2} \xlongequal{ } \\[1 em] & \xlongequal{ }-4+\sqrt{-72}+11+\sqrt{2}\cdot i\end{aligned} $$ | |
| ① | $$ - \sqrt{16} = -1 \cdot 4 = -4 $$ |
| ② | $$ \sqrt{121} = 11 $$ |
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