hi ,

i got a question on complex no. How to prove the question is correct?

|(3 + j4)^5| =5^5

| ( 1 + j 3 ) | 2

i know that |Z| = |x + jy| = sqrt (x^2 + y^2) = ( Z x Z*)

for the lower part , i achieve ( 1 + 3 ) = 4 using ( Z x Z*) which i think i am right

but i am stuck on the upper part. can't acheive the answer..

(3 + j4)^5 which i can determine the r = 5 but am i on the right track converting into euler form ?

Thanks a lot for any help :)