Question

Which choices are equivalent to the expression below? Check all that apply.A.2iB.-2C.D.

Answer 1

The given expression is √- 4. It can be written as

√4 * √- 1

Recall, √- 1 = i

It becomes

√4 * i

= i√4

Recall, √4 = 2. It becomes

i * 2

= 2i

Options A and C are correct