Question

I need help with this

Answer 1

`√(-16)=4i\\-√(-4)=-2i\\√(-4)=2i\\-√(-9)=-3i`

Explanation:

using the following properties:

`√(xy)=√(x)√(y)\\ √(-1)=i`

For example:

`√(-16)=√((-1)(16))=√(16) √(-1)=4i`

And so on