## anonymous 4 years ago is the square root of -64 = -8?

1. anonymous

$\sqrt{-64^{?}}$ = -8 ?

2. anonymous

$\sqrt{-64} = \sqrt{64} \cdot \sqrt{-1}$$\sqrt{-1} = i$

3. anonymous

4. anonymous

Just 8i

5. anonymous

oh is it because of the (sqrt)-1 ?

6. anonymous

Yes. We factor the negative one out to get i. Then we take the square root of a positive number.

7. anonymous

great tytytytyty :)