SOLUTION: Find the following quantities. 1. |(1+i)(2+i)|

Algebra ->  Test -> SOLUTION: Find the following quantities. 1. |(1+i)(2+i)|       Log On


   

Question 1177869: Find the following quantities.
1. |(1+i)(2+i)|

Found 2 solutions by ewatrrr, ikleyn:
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

Hi
|(1+i)(2+i)| = |2 + 3i - 1| = |1 + 3i|
Wish You the Best in your Studies.


Answer by ikleyn(52899) About Me  (Show Source):
You can put this solution on YOUR website!
.

It is about the MODULUS of a complex number.


    |(1+i)*(2+i)| = |(2 + 2i + i + i^2| = |(2-1) + 3i| = |1+3i| = sqrt%281%5E2+%2B+3%5E2%29 = sqrt%281%2B9%29 = sqrt%2810%29.    ANSWER

Solved, answered, explained and completed.