Question

find the modulus and amplitude for the given complex number.
(1+2i)2 (1-i)

Answer 1

mod =sqrt of 40 i

Answer 2

Isn't the multiplication sign between the brackets, instead of the number 2?
(1+2i)X (1-i)
Or the 1st bracket is raised to square
Be more specific, pls!

Answer 3

ok first of all the modulus is a real number. the distance to the origin. so it cannot be
\[\sqrt{40}i\]