Write answer in both rectangular from and polar Q in degre

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SUMMARY

The discussion focuses on converting complex numbers into both rectangular and polar forms, specifically addressing two problems: (1 + i)(2 + 2i) and -2 + 2i. The user received feedback highlighting errors in their calculations, particularly in the squaring of (2i) and the use of the arctangent function in part (b). Correcting these mistakes is essential for accurate representation in polar coordinates.

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r-soy
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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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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-[tex]\pi[/tex]/4.
 
r-soy said:
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
 

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