# Math Help - complex numbers

1. ## complex numbers

Can anyone help?

I need to express the complex number

z=7+i/3-i

in cartesian form.

Thanks.

2. I assume this is $\displaystyle z = \frac{7+i}{3-i}$.

If so, multiply top and bottom by the bottom's conjugate.

3. Thank you so much, just being a bit of an air head today.x