## anonymous 4 years ago would someone help me with: (squared)-128(squared)-16

1. anonymous

$\sqrt{-128} \sqrt{-16}$ is what I meant

2. anonymous

I started with : $\sqrt{128} x \sqrt{-1} x \sqrt{16} x \sqrt{-1}$ is that correct? then I got : 11.3137085i x 16i

3. Mertsj

|dw:1327790382296:dw|

4. anonymous

looking and I am confused where the 'b' came from and the 4i?

5. anonymous

and the 64 x 2?

6. anonymous

oh never mind , 64 x 2 = 128