Choose the one alternative that best completes the statement or answers thequestion.
Express in terms of i.
-$\sqrt{-16}$
A) - $4 \mathrm{i}$
B) $-\mathrm{i} \sqrt{4}$
C) $4 \mathrm{i}$
D) $\pm 4$

Question

Quizplus · Accepted Answer

The square root of -16 can be expressed as $\sqrt{-16} = \sqrt{16} \cdot \sqrt{-1} = 4i$, where $i$ is the imaginary unit defined as $\sqrt{-1}$.

Choose the One Alternative That Best Completes the Statement or Answers