maths help me urgently!!!!!!

rationalise [1-(2i^2)]/i
Plz help show we working so that i can learn

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asked by david
  1. i^2 = -1
    1 - 2(-1) = 3
    so this is
    3/i
    multiply top and bottom by i
    3 i/-1
    or
    -3i

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    posted by Damon

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