Question

what is the square root of -64?

Answer 1

imaginary numbers

\[\sqrt{-64}\] = \[\sqrt{64}\times \sqrt{-1}\]
= \[8\times i \] \[(i = \sqrt{-1})\]

Answer 2

so I assume it would be D.) not a real number

Answer 3

we cannot take normal roots of negative numbers, so here is how we go about it:
\[\sqrt{-64} =
\sqrt{-1 * 64} =
\sqrt{-1} * \sqrt{64} =
i * 8 =
8i\]

Answer 4

Yeah, its not a real number

Answer 5

thx you !