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14 November, 23:14

Show that f (2-3i) is a real number

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  1. 15 November, 00:00
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    It's not a real number. Remember that i represents √-1. The only way to make it a real number is to multiply i by itself (so i * i or i^2), which will make it - 1

    Distribute the f: 2f - (f*3i)

    Since the i is still only to the power of 1, it is not a real number. It's imaginary
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