## anonymous 4 years ago simplify (squareroot of -4) times (squareroot of -9)

1. anonymous

|dw:1327733590778:dw|

2. anonymous

6 to explain:

3. anonymous

|dw:1327733624424:dw|

4. anonymous

there's two ways to do this: 1. multiply the values inside the roots. this becomes sqrt36 which is 6. You can also

5. anonymous

Which is 6.

6. anonymous

write sqrt(-4) as 2i and sqrt(-9) as 2i and 3i respectively. Especially because you're working on complex numbers, you might want to show your work this way.$\sqrt{-4}\times \sqrt{-9}=2i \times 3i = 6i^2=....-6$

7. anonymous

So there can be two answers for this?

8. anonymous

6 or -6?