Question

Simplify the following expression; express in terms of i.
square root of -72

Answer 1

72i

Answer 2

since \[i =\sqrt{-1}\]

Answer 3

what why is that the answer

Answer 4

express in terms of i.....

\[i=\sqrt{-1}\]
\[72i=\sqrt{-72}\]

Answer 5

are you sure because it is always a factor of 72

Answer 6

ohhh.. i'm sorry. i didn't think....

Answer 7

\[\sqrt{-72}=\sqrt{-1*2*36}=6i \sqrt{2}\]

Answer 8

this is the right answer.

Answer 9

ok thank you i thought it looked wrong to me