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5 September, 00:24

Simplify. (3-4i) (1+5i) - (2-i)

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  1. 5 September, 02:07
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    [ (3 - 4i) (1 + 5i) ] - (2 - i)

    = (3 + 15i - 4i - 20i ²) - 2 + i

    = 3 + 11i - (20 * - 1) - 2 + i

    = 1 + 12i + 20

    = 21 + 12i
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