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March 24, 2017

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Evaluate x^2 - 3x + 6 for x=3+i
(3+i)^2 - 3(3+i)+6
3+2i-9-3i+6

I got 0 - 1i
is this correct or do i use 0

  • math - ,

    from
    (3+i)^2 - 3(3+i)+6
    = 9 + 6i + i^2 - 9 - 3i + 6
    = 3i + 5, remember i^2 = -1

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