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

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- Apr 23rd 2010, 09:00 AMr-soywrite answer in both rectangular from and polar Q in degre
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 - Apr 23rd 2010, 12:26 PMHallsofIvy
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.