Question

Help with a Expression to Notation?

Answer 1

Express \[\sqrt{-72}\]

Answer 2

-8.48528...

Answer 3

\[A. 6\sqrt{-2} \]
B. 72i

C. \[6i \sqrt{2}\]

D. \[\sqrt{-72i}\]

Answer 4

\[\sqrt{-72}=\sqrt{-2\times6^{2}}\]\[=6\sqrt{-2}\]\[=6\sqrt{-1\times2}\]\[=6\sqrt{2}\sqrt{-1}\]
But \[\sqrt{-1}\]is given the symbol i.
so \[\sqrt{-72}=6\sqrt{2}i\]

Answer 5

SORRY