Question

Test in an hour. Please help.

Answer 1

Now.. on the first one $\bf \sqrt{-27}\cdot \sqrt{-3}\impliedby \textit{first, you convert them to "i" form} \\\\\\ \sqrt{3^2\cdot 3\cdot -1}\cdot \sqrt{3\cdot -1}\implies \sqrt{3^2}\cdot \sqrt{3}\cdot \sqrt{-1}\cdot \sqrt{3}\cdot \sqrt{-1} \\\\\\ 3\sqrt{3}\ i\cdot \sqrt{3}\ i\implies 3(\sqrt{3})^2\ i^2\implies 3\cdot 3\cdot i^2\impliedby recall\quad i^2=-1 \\\\\\ -9\implies -9+0i$