Power Systems
How to find the total number of strands (N) when number of layers (x) are given

 Total number of strands N = 3x² + 3x + 1
 Total number of strands N = 3x² - 3x + 1
 Total number of strands N = 3x² - 3x - 1
 Total number of strands N = 3x² + 3x - 1

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