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Let a = 4 + 3i, b = 1 -2i, and c = 8 - 5i. The complex number d is such that a,b, c, and d form the vertices of a parallelogram, when plotted in the complex plane. Enter all possible values of d, separated by commas.

 Jul 28, 2020
 #1
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Can I also have a solution? I need help asap. If you know how to do it, can you please help me? Thanks.

 Jul 28, 2020
 #2
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Easiest to look at it on a graph   then     11+0i     and  5  - 10 i    look to be solutions

 

https://www.desmos.com/calculator/dtvkny3kpe

 Jul 28, 2020
edited by ElectricPavlov  Jul 28, 2020

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