are these answers right?

1. �ã-121 =
i�ã11

2. -2�ã-144 =
2i�ã144 =
2i*12=24i

3. �ã-75 =
i=�ã75 =
i�ã5sq*3 =
5i�ã3

4. 5�ã�ã-27 =
5i�ã27 =
5i�ã3sq*3 =
15i�ã3

what about
5. �ã-6 * �ã2 = ??

6 answers

I will assume that your ã was supposed to come out as √

I disagree with #2
-2√-144
= -2i√144
= -2i(12)
=-24i (you lost the negative sign)

Also I will assume that in#4, the double square root was a typo
If so, then the rest were correct.
#5
√-6√2
= i√12
= 2i√3
yes to #4 i don't know how they symbols don't come out when i type them one way.

Can you help with #5? I didn't get it.

Thank you.
sorry, i see #5 THANK YOU!
If you are on a Mac...
hold down the "Option" key and press V, then release to get the √
There are a whole bunch of those shortcuts, like hold down the "Option" key, and press p to get π

on a PC , I hold down the Alt key, and while holding it down, pres 251 on the number pad, then release. You should get a √ sign
Again just like on a Mac, you can experiment with these on a PC to get different symbols
e.g. try "Alt" 241 to get ±
±âˆš