Write Complex Numbers in Standard Form...2

Discussion in 'Other Pre-University Math' started by nycmathguy, Sep 15, 2021.

  1. nycmathguy

    nycmathguy

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    Section 2.4
    Question 60

    20210914_043519.jpg
    sqrt{-5} • sqrt{-10}

    Let sqrt{-5} = sqrt{5}•sqrt{-1} = 5i

    Let sqrt{-10} = sqrt{10} • sqrt{-1} = 10i

    Note: sqrt{-1} = i.

    (5i)(10i)

    50i^2

    Note: i^2 = -1.

    50(-1) = -50

    Answer: -50

    You say?

    Can you do 66?

    Thanks.
     
    nycmathguy, Sep 15, 2021
    #1
  2. nycmathguy

    MathLover1

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    60.
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    66

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    MathLover1, Sep 15, 2021
    #2
    nycmathguy likes this.
  3. nycmathguy

    nycmathguy

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    I did my best but most likely rushed my way through question 60. Nicely done at your end.
     
    nycmathguy, Sep 16, 2021
    #3
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