Originally Posted by

**Turkey** z = i(2 - i)/(1 + 2i) - (2 - i)

For some unknown reason, I cannot get the right answer when expressing this in polar form. To start off, I multiply the fraction by:

(1 - 2i) / (1 - 2i)

The fraction then calculates to 5/-3. My second step is to move into the subtraction. This leaves me with the answer:

z = (11 - 3i) / -3

Therefore I would like to conclude that:

z = 11/-3 + i

Henceforth:

a = 11/-3

b = 1

Now I calculate range via:

r = sqrt(a^2 + b^2)

After that calculation there, I can already see that I've stuffed something up along the way. Would anyone care to enlighten me please?

Thanks in advance,

C. Anderson