Question

How do I subtract 3√3i - 3i without using a calculator?

Answer 1

is 'i' the imaginary number or a variable? @abcdx6

Answer 2

it's an imaginary number

Answer 3

I'm trying to learn how to add and subtract these kinds of problems even without the imaginary number..

Answer 4

You don't need to. Just factor out the 3i from both terms:

3√3i - 3i = (√3 - 1)3i = (3√3 - 3)i.

That's the final complex number. If you want to write it in the form a + bi then you can re-write that as 0 + (3√3 - 3)i where a = 0 and b = (3√3 - 3).

@abcdx6

Answer 5

omg thank you! :)