Question

Which of the following is equivalent to the expression below?

√ -64

A.-8i
B.-8
C.8i
D.8

Answer 1

The square root of a negative number is not a real number, but rather an imaginary number. The square root of -64 can be simplified as follows:

√-64 = √(64 * -1) = √64 * √-1 = 8i

Therefore, the answer is A) -8i.