Hi please see the attached pdf. I need help with the following

10.) B

11.)

12

13.

I'm confused. I already know all the answers because they are given. What i need is an explanation/guidance.

Thanks

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- Nov 6th 2012, 08:56 PMBenja303Help with complex numbers
Hi please see the attached pdf. I need help with the following

10.) B

11.)

12

13.

I'm confused. I already know all the answers because they are given. What i need is an explanation/guidance.

Thanks - Nov 6th 2012, 09:17 PMMarkFLRe: Help with complex numbers
10.)

b)

11.)

Equating coefficients, we obtain the system:

Adding, we find:

and so

12.)

13.)

where