Write answer in both rectangular from and polar Q in degre

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The discussion focuses on verifying answers for complex number multiplication and conversion to polar form. In part (a), there is a correction regarding the calculation of (2i)², which should equal -4 instead of 4i. For part (b), the correct calculation for the angle involves using tan⁻¹(2/-2) instead of tan⁻¹(2/2). Additionally, there is confusion about the expression 45 - π/4, which needs clarification. The participants also inquire about the educational level of the person seeking help to tailor their assistance appropriately.
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-\pi/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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