Simple Question (1 Viewer)

Jerruy

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Solving for L:
T = 2piL^2

2piL^2 = T

L^2 = T/2pi

L = ± ROOT T/2pi



This is all easy...but my question is, why is it + or - ??

Would you miss out on any marks in the 2 mark question if u didnt do ±?
 
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you would get 1/2 since there is both a positive and negative answer for a squared number?
 

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