Question

Help with complex number just 2 small questions

Answer 1

@thomaster @BangkokGarrett @Luis_Rivera @Ashleyisakitty

Answer 2

@DebbieG Can you help me please

Answer 3

@Gin_Ichimaru

Answer 4

For \[\large \sqrt{-48}\]always start by "pulling out" the \(\large \sqrt{-1}\).
Eg, for a>0:
\(\large \sqrt{-a}=\sqrt{-1\cdot a}=\sqrt{-1}\cdot \sqrt{a}=i\sqrt{a}\)

After that, you can simplify the part under the square root just as you normally would. But get the i out of the way first.

I'll do a similar example:

\(\large \sqrt{-45}=\sqrt{-1\cdot 45}=\sqrt{-1}\cdot \sqrt{9\cdot 5}=i\sqrt{3}\cdot \sqrt{5}=3i\sqrt{5}\)

Now try yours. :)