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21 August, 04:42

Which is equivalent to the expression below? the quantity 2 minus 5 eye, close quantity, times the quantity 4 plus 7 eye,?

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  1. 21 August, 08:40
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    (2-5i) (4+7i) = 2 (4+7i) - 5i (4+7i) = 8+14i-20i-35i²

    recall that i²=-1,

    8-6i+35=43-6i

    43-6i is the final answer
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