Write in terms of i.
-$\sqrt { - 400 }$
A) $- 20 \mathrm { i }$
B) $20 \mathrm { i }$
C) $\mathrm { i } \sqrt { 20 }$
D) $\pm 20$

Name: Write in terms of i. -$\sqrt { - 400 }$ A) $- 20 \mathrm { i }$ B) $20 \mathrm { i }$ C) $\mathrm { i } \sqrt { 20 }$ D) $\pm 20$
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Question

Quizplus · Accepted Answer

The square root of -400 can be written as $\sqrt{-400} = \sqrt{400} \cdot \sqrt{-1} = 20i$, where $i$ is the imaginary unit defined as $\sqrt{-1}$.

Write in Terms of I −400\sqrt { - 400 }−400​ A) −20i- 20 \mathrm { i }−20i

Write in Terms of I $\sqrt { - 400 }$ A) $- 20 \mathrm { i }$