Choose the one alternative that best completes the statement or answers the question.
Simplify the expression in terms of i:
-$\sqrt { - 49 }$
A) $7 i$
B) $49 i$
C) $i \sqrt { 7 }$
D) $- 7 i$

Question

Quizplus · Accepted Answer

The square root of -49 can be simplified as $\sqrt{-49} = \sqrt{49} \cdot \sqrt{-1} = 7i$, where $i$ is the imaginary unit defined as $\sqrt{-1}$.

Choose the One Alternative That Best Completes the Statement or Answers