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Simplify the Expression $\sqrt { - 21 }$ A) $21 i$ B) $i \sqrt { 21 }$

Question 157

Question 157

Multiple Choice

Simplify the expression. $\sqrt { - 21 }$

A) $21 i$
B) $i \sqrt { 21 }$
C) $- 21 i$
D) $- i \sqrt { 21 }$

Correct Answer:

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