# Math Help - Complex number equation

1. ## Complex number equation

The question:
Verify (-1 + i)^7 = -8(1 + i) both directly and using the polar form.

I know how to verify this via polar form, but I'm not sure what they mean by verifying it "directly". Does this mean via binomial expansion? Thanks!

2. Originally Posted by Glitch
I know how to verify this via polar form, but I'm not sure what they mean by verifying it "directly".
By directly, I think they mean by expanding the LHS.
Does this mean via binomial expansion?
Your guess is as good as mine.

3. Ok, thanks.