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3 March, 18:42

Find the missing term. If y = 1 + i, then y3 - 3y2 + (-3y) (-3y + 1) (3y) (3i) - 1 = - i.

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  1. 3 March, 18:49
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    Filling in y=1+i without the missing term yields - 3-4i.

    -3-4i = - 3 (1+i) - i

    So we have to add 3 (1+i) to get to - i.

    3 (1+i) = 3y, so 3y is the answer.
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