Question

Simplify: V - 72 - O A. 5i73 O B. - 6172 O c. 6172 O D. - 5iv 3

Answer 1

given

$\sqrt[]{-72}$$\begin{gathered} \sqrt[]{-72} \\ =\sqrt[]{-9\times8} \\ =\sqrt[]{-(3\times3\times2\times2\times2}) \\ =2\times3i\sqrt[]{2} \\ =6i\sqrt[]{2} \end{gathered}$

the answer is option c.