Question

Simplify: square root -8 times square root -2

Answer 1

-4.

Answer 2

\[\sqrt{-8{\sqrt{-2}}}\]

this?

Answer 3

but i thought you couldn't square root a negative number? The second one looks better

Answer 4

I got -4. It is i square root 8 minus i square root 2. Which gives you i^2 square root 16. Which is (-1)(4). And gives you the answer -4.

Answer 5

Shouldn't it be
\[\sqrt{-8}\sqrt{-2} = \sqrt{16}?\]

Answer 6

thats what i was thinking at first... i wasnt sure

Answer 7

By the way, you will learn later on that you can take the square of a negative number.

Answer 8

ans \[2^{7/4}\times i ^{3/2}\]

Answer 9

i is imaginari number its value(\[\sqrt{-1}\])