# Thread: imaginary numbers

1. ## imaginary numbers

need to solve 6-6i/-9i

came up with the answer 2/3 + 2/3i

What am I doing wrong. It's showing up as incorrect.

Thank you.

2. ## Re: imaginary numbers

You're missing a negative sign

$\frac{6-6i}{-9i}=\frac{2-2i}{-3i}=\frac{2-2i}{-3i}\cdot \frac{i}{i}=\frac{2i-2i^2}{-3i^2}=\frac{2i+2}{3}$

EDIT: My bad I read the question wrong. I have edited my answer accordingly.

3. ## Re: imaginary numbers

Hello, needhelpnow!

Simplify: $\frac{6-6i}{-9i}$

Came up with the answer 2/3 + 2/3i

What am I doing wrong? It's showing up as incorrect.

Your answer, $\tfrac{2}{3} + \tfrac{2}{3}i$, is correct.

If you entered your answer as 2/3 + 2/3i,
. . it might be read as: $\tfrac{2}{3} + \tfrac{2}{3i}$

Try entering it as. 2/3 + 2i/3. or .2/3 + (2/3)i.