Which of the following is equivalent to the expression below? Square root of -81 A. 9 B. -9 C. 9i D. -9i

Danila Ganchar asked Jan 7, 2022

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45 votes

Which of the following is equivalent to the expression below?

Square root of -81
A. 9
B. -9
C. 9i
D. -9i

Danila Ganchar asked Jan 7, 2022

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19 votes

Answer:

C 9i

D -9i

Explanation:

sqrt(-81)

sqrt(81) sqrt(-1)

we know that sqrt(-1) = i

±9i

Rotemitz answered Jan 12, 2022

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