Write answer in both rectangular from and polar Q in degre

[r-soy]

Hi

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

 

[mrbohn1]

In part (a), you seem to have assumed that (2i)²=4i, which is wrong...(2i)²=-4.

In part (b) you have written: tan^-1(2/2), where it should be: tan^-1(2/-2). Also I don't understand why you have written: 45-$$\pi$$/4.

 

[Susanne217]

Hi

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

Which level are you at? College? I will like to know that before I help you