15-5i/3i

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Solution for 15-5i/3i equation: 


i in (-oo:+oo)

15-(((5*i)/3)*i) = 0

(-5/3)*i^2+15 = 0

-5/3*i^2 = -15 // : -5/3

i^2 = 9

i^2 = 9 // ^ 1/2

abs(i) = 3

i = 3 or i = -3

i in { 3, -3 }

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