Question

How to express the radical using the imaginary unit , i. Please help

Answer 1

Answer:

± 4i$\sqrt{5}$

Step-by-step explanation:

$\sqrt{-80}$ = $\sqrt{16(5)(-1)}$

= $\sqrt{16}$ × $\sqrt{5}$ ×$\sqrt{-1}$

= 4$\sqrt{5}$i → [ $\sqrt{-1}$ = i ]