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1 January, 11:33

What is the standard form of (1 + 7i) (3 - i) ?

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  1. 1 January, 11:43
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    Consider this option:

    1. if the standard form is z=x+iy, then

    2. (1+7i) (3-i) = 1*3-1*i+21i-7i*i=3-i+21i+7=10+20i

    answer: 10+20i
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