Which expression is equal to 2−32−−−−√ ?
\(2\sqrt{-32} \\~\\ =2\cdot\sqrt{16\cdot2\cdot -1} \\~\\ =2\cdot\sqrt{16}\cdot\sqrt2\cdot\sqrt{-1} \\~\\ =2\cdot4\cdot\sqrt2\cdot i \\~\\ =8i\sqrt2\)
