Question

Which of the following are equivalent to the expression below? sqrt -16

A. 4i
B. -4
C. -4i
D. 4​

Answer 1

B.) -4i i think i don’t know for sure

Answer 2

A and C

Explanation:

Using the fact that
`√(-1)` = i , then

`√(-16)`

=
`√(16(-1))`

=
`√(16)` ×
`√(-1)`

= ± 4 × i

= 4i → A

= - 4i → C