I want check my answer
4 - write answer in both rectangular from and polar Q in degre
a ) (1 + i ) ( 2+ 2i )
b ) -2 + 2i
For the first one, you have written , which is correct but then you have that equal to 2+ 8i. so that is equal to 2+ 4i- 2= 4i.
For the second, the angle, is correct but "r" is wrong.
and so . You have 2.8 which is approximately correct but unless you are specifically told to use a decmal approximation, is far better.