Question

Simplify the number using the imaginary unit i.


A. 12

B. -12

C. 12i

D. 144i

Answer 1

\[\sqrt{144}\]

Answer 2

its a -

Answer 3

inside bracket or outside...?

Answer 4

inside

Answer 5

\[\sqrt{-144}\]

Answer 6

it is simple...
-1 is equal to i^2
and 144 is 12^2
hence within square root we get 12^2 xi^2
outside we get 12i
answer is C