1. ## complex number

hey guys! just a quick how to find inverse 1/z? for the complex number
(-3-4i)

i know its very easy, but its really late and my brain has givven up on me. sorry

thank you

2. Originally Posted by boomshine57th
hey guys! just a quick how to find inverse 1/z? for the complex number
(-3-4i)

i know its very easy, but its really late and my brain has givven up on me. sorry

thank you
Multiply by the conjugate $\displaystyle -3+4i$

3. the conjugate is -3+4i

so do i multiply (-3+4i)(-3-4i)

is that what u meant?

sorry if i sounds very stupid

thank you for helping me

4. Originally Posted by boomshine57th
the conjugate is -3+4i

so do i multiply (-3+4i)(-3-4i)

is that what u meant?

sorry if i sounds very stupid

thank you for helping me
$\displaystyle \frac{1}{-3-4i}\cdot\frac{-3+4i}{-3+4i}$